I love the size of the current iPad, no need to make it any smaller.
Facetime? That's what I have a phone (and iPod touch) for... I would rather have Facetime on my iMac or MacBook. If not native Facetime, then an iChat to Facetime bridge...
Gyroscope? Not a huge gamer, but I can see this. Especially because it makes the coding for games easier. (if everything has a gyroscope.)
Super high resolution? Um, it's really not an issue with iPad, given that it's on my lap or at arms length. It's not like a phone right in my face. Maybe a little bump so that 720p video can play at full height. (the 1024 is too narrow right now, so movies get shrunk down a bit). 1280x900? Might be too much for the current batch of video GPUs... I'd rather have smooth frame rates and 10+ hour battery life. Besides, the 960x640 "retina-ready" Apps look good at 1024x768.
A memory bump would be nice. I've been playing with iOS 4.2 on my iPad, updating my Apps. Everything runs great, but it would be nice to have extra ram to background more apps. 512mb would pretty much future-proof the next iPad.
I am going to buy one for sure. My whole family fights over the current iPad. It's the most used computer in the house.