Who do you need Ipad 3 ? People who bus Ipad 3 could be:
1. Apple fans.
2. Never own an Ipad and want to have one.
3. Want to upgrade the hardware.
Ipad 3 over Ipad 2
1. Finer screen resolution.
2. 1080p
3. better camera
4. more and faster CPUs
5. 4G
6. What else?
What I found:
1. faster browsing.
2. better video and photo.
3. 1080p if you would like to load your blue-ray quality movies to your Ipad.
4. touch panel is a little bit too sensitive.
5. no wifi issue and over-hot issue on my Ipad 3.
If only watch on-line video as most people do you don't need Ipad 3 for the better screen.
If don't use 4G you don't need Ipad 3.
If you already have Ipad 2 generally you don't need Ipad 3.
If you don't have Ipad 2 go and get a Ipad 3.