Looks enough like a D3 to me to be happy. If that thing can match my D3s, it's going to be a fun year.
I do have to wonder though if this sensor is going to find it's way into the D4x. One would assume so, and if so, would that be worth it. I had a HARD time finding justification for the D3x and didn't buy one. I don't think I'd be able to justify the cost of a D4x either if it's similar to the D3x. I do much prefer that body though.