Also, that means another line of FF mirrorless lenses...*shiver*Yeah, thats really the piece that makes this technology pretty far off. To actually release a full-frame mirrorless camera with all the lens options a pro would want (fast zooms, primes, tilt-shifts, super teles, etc), it'd take them years to fill out the line. Even if they release the body in the next year, it's probably 3-4yrs down the line until its a viable option as a system. That also assumes 3rd party manufacturers get behind it, otherwise it's probably 5-6yrs
Or for a comparison: Look at EF-s.
When digital APS-C first started coming out around the D30/10D time, there was no such thing as EF-s. You needed to buy a ridiculously expensive (compared to an EF-s kit lens nowadays at least) 16-35L or 17-40L, even a 20-35mm wasn't particularly wide on crop.
The first EF-s kit lenses, I'm looking at you, EF-s 18-55 non-IS mk1, weren't worth the box they shipped them in.
Flash forward what, 5-10 years, and now look. EF-s 15-85 IS is a great travel zoom, 17-55 f/2.8 IS is a great indoor zoom, EF-s 10-22, Tokina 11-16, Sigma 8-16 all provide great über-wide options in their niches. Even the latest 18-55 IS kit lens is worth the money (granted, it's not much money).
How long did that take? First EF-s body was 300D, August 2003.
EF-s 10-22 was probably the most pressing *need* of the new system, that was 2004 sometime.
EF-s 17-55/2.8 as the 'fast zoom' came out in 2006.
EF-s 15-85 as the '24mm equiv. wide zoom' came out in 2009 with the 7D.
So those three together make up the best 3 of the crop line lenses thus far, and it only took them what, 6 years to get those three together? SigRonKina have certainly helped prod things along by providing competition, especially in the über-wide segment.
Still, if we see a FF Mirrorless from canon, my bet is that the first will be in a DSLR body without a mirror (i've got a post elsewhere here
that explains why FF and Short Back Focus = bad for digital). But if/when they work out the kinks and give us a 20-35mm Flange-mount FF Mirrorless, they'll be relying on people using their existing EF lenses on adapter for a few more years yet while they gradually fill out the line-up with dedicated (read: smaller, not necessarily cheaper) short-mount lenses.