- backlit sensor = better low-light pictures, with dramatically less noise
- faster lens, hopefully with better clarity (less haziness that's characteristic of phone cameras)... but we'll see how well it actually works out
- and most importantly, fast. I know I hate using my phone's camera since by the time I pull it out and the phone lets me take my first picture, the moment's already passed. The whole "1 second to first picture, 0.5s between shots" I think is going to be HUGE. It's going to get people using their cell phones as cameras a lot more than than they are now.
The best camera is the one you have with you. And on that front, it's a good camera.