Most purchased them when they were first released. We call these people "early-adopters". When an early-adopter purchases 2 devices for a total well over $1000 the problem comes with having to drop that kind of money every 2 years.
Well, yes, Apple may be forcing the issue somewhat, but after 30 years of buying electronic goods that doesn't come as a surprise to me. A few other points:
1. Early adopters tend not to be the majority of purchasers. They are the minority who want to be first, are prepared to take a risk on a new product, and can't wait. Then, if the product is successful, come the mainstream. Those are the majority. so you're being disingenuous. Although there was a rush, the recorded figures bear me out.
2. You went (rushed) out and bought two (as an early adopter). You've been using them for two years for whatever advance things you do. They must have been doing the job pretty well. Do you need to buy those iPad 3s right now?
3. Newer apps will, in any case, increasingly make use of more cyles, higher resolution display etc. That's progress, and even if iPad 1 was given IOS6, these apps would increasingly fail to work adequately on the iPad 1.
4. If your life will really be so incomplete, then eBay your old ones (I can see decent first generations ones selling for around 250$, depending on spec. Voila, nearly half the cost of the new ones back. You won't have to shell out another 1000 USD.
4. Console yourself with the fact that you live in the US. Think yourself lucky they only cost you 500USD each.
Let's keep this in proportion :-)