okay, i didn't read al the posts but i had the time to go to the apple store today and take a quick look at it, I can tell you something being an iphone user, it doesn't make me remember my iphone at all.
The only thing I can say is that I was very impressed with it, is fast, movies look great, games play much better than on an itouch, ibooks is okay, maps are impressive.
my thoughts..
-about the right size
-resolution was impressive (720p is enough for the size) and movies look great
-keyboard not that awesome, don't try to write a 10 page paper on it.
-sound.. hope there is improvement on the upcoming gen, still you can use headphones
-reading books felt right, didn't hurt my eyes and feels a little natural
-Gaming.. definetly bye bye psp, and as for the DS i dont personally own one.
-surfing the web is the most impressive for me, felt better than home and computer, from my point of view we use a mouse to pint at something but the first reaction we have is to use our fingers to point.
-needs multitasking.. i guess is just timing since they can jump the revision of the iphone, they have to offer something impressive on their keynote.
my conclusion, if you can hold for next gen do it, but if you buy it i think you are going to enjoy it. personally i want one but i might wait because i have the experience of buying the first iphone and we all know apple.
sorry for the length