The only question is: How will it be implemented? The current E-Mount, from the look of it, does not seem to be able to accommodate a full frame sensor. So a new mount or a modified E-Mount maybe possible. For me personally, it's not a real problem, as I only have two E-mount auto focus lenses, and I am willing to accept a new mount.
If Sony can pull off this feat with a full frame sensor in an NEX style body, I bet many people will forgo their current big full frame DSLRs.
Interesting and exciting times. Can't wait for the official announcement.
I see pixels -- NEX-5N & Schneider-Kreuznach Componar 50mm f4.5 Enlarging lens with 4-blade aperture at f5.6 or f8.