I've posted earlier on this topic. Then, and now, I'm open to tell all I'm an Apple Shareholder and am not sold on every Apple product or idea. Yet, I'm also a realist and tend to look at the big picture. I also have found, people are generally more sold on bells and whistles, than getting something that really meets their needs.
I haven't read every response, but what I haven't seen a simple comparison of the iPad 3 vs iPad 4. Based on some simple research, here's the ditty (using TechRadar's comparison as it's pretty to the point):
iPad 3 vs iPad 4: Screen
Both the iPad 3 and the iPad 4 come with Apple's Retina display. Although "only" packing 264ppi, unlike the iPhone 5's 326ppi, the iPad's still have market-leading screens.
(JL1365 opinion - winner? Both)
Apple might not have upgraded the screen, but it did upgrade the front-facing camera. The iPad 3 came with a 0.3MP standard definition offering, whereas the iPad 4 makes full use of the Retina display for video chatting with a 1.2MP HD camera.
(JL1365 opinion: who really cares about the upgrade front facing cam? I've yet to meet any iPad user using video chat. I didn't use Skype, so I dumped it. I joined Google+, used the video chat once, and dumped it. The average person I know, would rather simply talk on a phone. So, this is not a deal breaker by any means. The upgrade isn't worth dumping your iPad 3).
Building upon the iPad 2, the iPad 3 comes rocking a dual core A5X processor, with a quad core GPU. However, the iPad 4 packs Apple's latest A6X processor, which Apple says "doubles the performance of CPU tasks."
(JL1365 opinion: whoopee. The fact is, unless you're using 4 applications at once time, which you really can't do on an iPad, like a macbook or PC, most folks won't notice the difference because most use their iPads for surfing the net, checking email, ebaying, yahooing, photos, etc. - Verdict: not worth dumping your iPad 3)
The iPad 4 comes with a battery that lasts up to 10 hours, but so does the iPad 3. Don't think that this is a bad thing though, we noted in our iPad 3 review that despite the high-resolution retina display, the battery life was "more than acceptable."
(JL1365 opinion, if the new iPhone 5 has new A6 and better battery, which reports are coming in the new battery is needed to simply run the new A6 chip, so the battery life is exactly the same as the iPhone 4s. Thus, I predict the same will happen here. I use my ipad 3 nonstop and the battery life is great. Verdict - it's a wash)
Apple's latest operating system, iOS 6, was recently launched alongside the iPhone 5, so unsurprisingly it's also featured on the iPad 4. The iPad 3 launched with iOS 5.1 but is upgradeable to iOS 6.
(JL1365 opinion: Well, considering the iPad 3 is upgradable and will be for some time, what's the issue? The reality is, I recently read the iOS 6 upgrade announcement that flashed on my iPad 3. All the fixes and upgrades were for iPhone 5, nothing to do with my iPad 3. Verdict; no issue)
With the announcement of the iPad 4, you'd be forgiven for thinking that the iPad 3 would be made cheaper. Apple has different ideas, with the plan seeming to be to phase out the 3rd gen iPad.
The iPad 4 comes in at the same price of the iPad 3, with the Wi-Fi only tablets coming in at £399($US499, AU$539) £479(US$599, AU$649) and £559(US$699, AU$759) for 16GB, 32GB and 64GB respectively. The aptly named Wi-Fi + Cellular versions cost a bit more, at £499(US$629, AU$679), £579(US$729, AU$789) and £659(US$829, AU$899) for the three storage options.
(JL1365 - pricing is the same
The big difference between the two iPad generations lies within their connectivity options. The most obvious of these is the new 8-pin Lightning dock, first announced on the iPhone 5.
This is 80 percent smaller and more durable than Apple's original 30-pin offering. The other major difference is that the iPad 4 (Wi-Fi + Cellular version) comes LTE enabled. The iPad 3 did come enabled with 4G, however, it couldn't be used in the U.K. But, with the introduction of the iPad 4 Brits can also enjoy super fast mobile internet when they're out and about.
(JL1365 opinion: if there is any one issue, it's the connectivity of LTE. When you realize those in the UK had issues to begin with, there was bound to be the need to reinvent. Yet, that said, I have a WiFi model, and to solve this problem, I use the HotSpot feature of my Verizon Droid Razr Maxx which get's 4G LTE. Doing this, my iPad3 hums with no issue and lightening quick. The other fact is unless you live in a 4G LTE zone, who cares that the iPad 4 is LTE. 4G LTE is still only availalble in populated states, such as NY, CA,, etc. then in major metro areas. So, if you live in a place that has no 4G LTE yet, what's the complaint?)
JL1365 - Overall, as I've noted before, this iPad upgrade is truly bells and whistles. The iPad 4 (or iPad Retina) stills has the same issues as all other iPads:
1) Adobe Flash - Sites using Adobe Flash, won't work all the time. Adobe Flash is no longer available for mobile devices (except Android Smartphones which can use the last incarnation of Flash 11). So, like Safari on the Macbook, you'll get to some sites or Youtube videos, some work, some don't
This is where Apple failed miserably as they, nor the other big players have done anthing to address the loss of Flash. Jobs oohed and awwed about how HTML 5 Video would take over; well, where it is. Meanwhile, Web designers have to face the facrt that some of their viewers will not see their video
2) Facebook - Both the 3 & 4 are going to be limited on use with Facebook. It's a good example I can give. Go to FB on the normal full site and you can't delete a post; go ahead try it. Instead, it thinks you're clicking on the post and opens any photo. Also, you can't upload more than 5 pics at a time to create an album. the iPad is more than capable to do more than 5 pics, so this is a poor software limination by Apple
I could go on, but my point is, the upgrade is nothing more, than adding 4G LTE and that's it. For those with iPad 3, stay with it, it probably meets your needs. While I'm a shareholder, I don't believe in throwing away money for no reason. This is Apples best marketing feature; get users to continually upgrade, regardless if it's really better or not.