I believe this is the 4K Studio Back: http://community.sony.com/t5/F5-F55/F55-4K-LIVE-Studio-config/td-p/115663
Nothing new here, sorry folks. Though it's a really cool studio back!!!
Wow, really impressed by the pocket cam. I've loved shooting with the BMCC, and this is exactly the little DSLR style camera I want. I WONDER if it would accept some sort of nikon battery grip? I think those are nikon bats in there.