I think it could be best summarised as:
If you're a new buyer, go into the store, look at an iPad 2 and "New Ipad" side by side, on, and if you can tell the difference, then go and spend the extra 1k+, if you can't, or you don't think its worth it, then get the iPad 2. Not a big deal really.
If you have an iPad or iPad2 already, do the same thing. I personally wouldn't upgrade if I had an iPad 2. Not worth the cash drop in buying and selling.
If you find the resolution on an iPad 2 too limiting, then you should be moaning about this when it comes to your phone, laptop, 24" monitor etc. (unless you have a 4S).
Its the same story as televisions, a lot of us are resolution snobs, yet some cannot even realise that a flat panel LCD is clearer than an old TV. Some also cannot see the benefit of HD over SD.
If you're buying an iPad 3 or LED TV because it looks better than the one next to it in the store, its not really linked to your experience when its in your living room. Only buy the better one if you see a great difference, and find some kind of inferiority in the other one.