I can see Apple upgrading their USB2.0 to 3.0 at some point in the future, but not any time soon. USB 3.0 devices just do not take a lot of market share, so the increased price of updating the hardware (that gets passed onto the consumer) is not worth it. Apple never believed that USB 3.0 would take off, and it really hasnt. But seriously, they should take the hit and just upgrade their new products to USB 3.0. Its the same physical shape and size, why not?
They fully adopted and implemnted Thunderbolt, and for truly faster performance and data integrity checking they want you to go to Thunderbolt. Even that is slow to take off. Thunderbolt will be on non-Apple products also, so if that ever really fully takes shape then thunderbolt will be the way to go. See this article for PC with both USB 3.0 and Thunderbolt coming.
Products manufactured today are still USB 2.0 for the most part, just because of current product out there versus manufacturing cost.
You can buy and use a USB 3.0 device, as it it backwards compatible with USB 2.0, just not at the 3.0 speeds.
Nope, sir. First you get this:
And then this: