I wouldn't count micro-4/3 or Olympus out yet. I think here at RFF, most of us start with 35mm as our baseline (not to mention...rangefinders!) and 4/3 and m4/3 has always been a hard sell with the 2x crop factor. But I bet most of the people buying cameras today have no idea about full-frame cameras and crop factors on smaller chips. To an extent I get this: you look for a camera that has a good set of lenses. For some that's fast primes, others that's zooms. M4/3 has both now, and it's a robust lens family, far ahead of Nex at the moment. To me the crop factor has really been mitigated by fast primes (even for APS-C cameras with the more recent batch of bargain-priced "fast-fifty" equivalents from Nikon, Sony and Pentax.
Anyway, my point is that most of us HERE look at these cameras as potential carriers for our M glass. Few others even know what that sentence means. M4/3 still has the most robust overall CEVIL system. Sony might be the camera of tomorrow (eh) but it's still today for them. What's sorely lacking--and would be a home run for either Olympus or Panasonic, though it's the former that has the track record to pull it off--is a pro-level m4/3 body. I remember a while back someone at Olympus saying that they were waiting for all the technologies to ripen to the level that the pro body would really represent something akin to their pro 4/3 bodies like the E-5, in other words viewfinder and autofocus capabilities up to DSLR standards. The VF-2 was already pretty good, and Sony is showing what can be done with EVFs. The focus on the E-P3 and new range of lenses is closing the gap as well. Now they need to finally get a less noisy sensor, and wrap it up in a weatherproof body. In that sense the Nex 7 has the edge, but where are the lenses? The cart is coming before the horse.