While there aren't that many upgrades coming with the new iPad, there are a few that geeks will love: a higher-resolution Retina display and a 5MP camera. Considering a purchase? There are some tempting features, and if the camera is a deciding factor for you, take a look here: a side-by-side comparison of the new iPad (on the left) and the iPad 2 (on the right).
You can see that the new iPad camera allows a better range of colors and the iPad 2 photo is more pixilated. It's an obvious upgrade, but one that I'm not sure is worth a purchase alone.