Looking to the set of pictures posted at Apple site for the coming new operating system Mac OS X Lion I can speculate (guess) that the new iPad 2 will be a new Mac Book Air with touch screen and a removable keyboard… or even better a wireless keyboard.
Or the new iPad 2 will be in the same case as the existing iPad but that will run the new Mac OS X Lion instead of iOS (a big wow anyway).
In any case, think that Apple is going to make another hit with the new operating system Mac Book Air/iPad 2
From the attached image, if you remove the keyboard and change the name of Mac Book Air for iPad 2 you will have a very close idea of what I mean.
I already added one to my wish list.