I don't know if this means that more development resources are going to the NEX system, but I hope that Sony is looking into a full frame version of the NEX. I'm sure the registration distance will create issues, but I'd love to see the world's first mirrorless system camera with a full frame image sensor.
If you had asked me two weeks ago about the future of full frame mirrorless cameras I would have told you that Nikon or Canon will be the first to release a full frame mirrorless camera, but after the announcement of Nikon's 1-system it is clear that Nikon and Canon are too afraid of competing with existing DSLR sales. It's "penny smart" in the short term (because they won't lose DSLR sales to a compact system camera of their own design) but it's "dollar stupid" in the long run (because everyone from consumers to professionals would love to have a physically smaller camera that delivers "big camera" image quality and performance/features).
That said, unless the NEX-7 delivers worse high ISO performance than the NEX-3/NEX-5, I'm probably content with Sony leaving APS-C sensors in the NEX line rather than trying to squeeze a full frame sensor into the body and attach even larger lenses onto the mount.