LEGO has created a list of Frequently Asked Questions (FAQ) about the EV3 Retail set. It includes a side-by-side comparison of the NXT and EV3. Keep in mind that it’s a bit market-y (they’re a little selective about the things they compare), but it’s informative none the less. Just point your browser here: [LINK].
I am looking forward to when I can give some more technical information about this awesome new platform. Just stay tuned!