5B transistors is good for a full Tahiti (32 CUs, 384-bit memory controller, dedicated video hardware, etc.) plus 8 jaguar cores (assuming some 40M transistors each?) and still have some 500M transistors left.
Forza looked good..... but man it seems like EA was not ready for next gen again, like the last time. The animation, the graphics, I don't know man...just doesn't look good.... look realistic. I mean Madden 13's lighting and graphics gave off a more photo realistic feel. Where as that trailer came off more cartoony. I don't know what to expect come launch time.
Aside from the live action, based on what do you claim those are just "CGI" and not in-engine scripted events representing game quality (not just Quantum Break but the rest too)