Originally posted by thibs Improved AF is likely to me (although less AF points than K-7) but silent mirror/shutter is a no go. It costs a lot to dampen those. Forget it. It may be better than current K-m but as good as K-7 is quite unrealistic.
It would lack at least three things the K-m provides: weather seals, video and higher buffer. Perhaps it would also lack the quieter shutter, if, as you say, that is expensive to include. But many of the other improvements have been capitalised already so it would cost little more to put them in the K-x.
Still, if it isn't smaller again than the K-7 there would be no reason to switch from the K20D.