Yea I'm thinking early April and it will have a new smaller die version of the A6X which will be smaller and more power efficient. From what I can tell the only thing holding it up is that new thinner screen.This.
If this comes in March, big IF. It'll still have A6X.
But with a smaller case, they've had to have made some major new evolution of battery technology... or we'll be looking at a 6-8hr battery life iPad, and Apple's not going to make that sacrifice.
The "new" 128 gig iPad being released now just makes me think they are going to use up iPad4 parts inventory at the factory in anticipation of moving onto a new model.