Ok, have upgraded my original Galaxy Note 1 for the new Note 2. Some brief opinions will follow.
1. The screen is not significantly better, maybe a little improved in video.
2. Dimensions: the rounded narrower form factor makes it much easier to hold one handed.
3. Much faster, quad cores are cool. plus the 2GB ram probably helps.
4. Nice stylus as others have commented.
5. Better software, especially the floating video option.
6. Overall 4.5 stars, as the screen on the Nexus 7 and HTC One X are better, whiter and sharper.
I lov my Note 2, its a pocket super computer. What more do you want?