Granted, that's assuming a totally-shared library is happening at all.
It's a best-case scenario for sure, though.
On a scale it probably goes...
Totally shared --> Console plays most games, but some are exclusive to one form factor --> Another split library (would be pretty dumb so hopefully that doesn't happen again)
At the very least, I think a sign of something would be appreciated. They missed GDC which seemed like a big opportunity for anything. I think while it's understandable relatively to wait until then, they're cutting it pretty close from a marketing point of view.
Sony revealing PS4 in February with a further blowout in June was a pretty good model. But we'll probably get a vague idea of what NX is at the meeting and then "we'll say more at E3".