Such a sensor doesn't necessarily finds its way to the photography market, just like Dalsa has a 48MP-CCD with microlenses nobody uses.
Liveview, it seems to be a power-related problem, I wonder how long the batteries would last if the would allow (it's a firmware thing) live-view without tethering.
"Agreed. Nikon has shown what is possible with CMOS in the D3x, and improvements will continue. The DR and tonality advantages of full-frame CCD are rapidly disappearing, meanwhile the inability to support live-view (as well as the poor low-light performance) are becoming huge liabilities. I predict it will be a big win for whichever MF vendor has the balls to ditch FF-CCD first."
But right now, such a MFDB would compromise IQ as the 6µm-CCDs are still superior and we still haven't seen what their capable of regaring the combination with microlenses unless Leica releases their final firmware. As a M-user, I would love CCD-liveview. I'm sure they will switch to CMOS within the next years but I hope that they order proprietary (from Cypress, Dalsa...) solutions instead of just buying a sensor from Sony - we need diversity, not one technology with the very same pros/cons in the whole market.