They had early hardware units from E3 onwards - you can see them in photographs and videos with Forza, Killer Instinct, FIFA 14, I think Ryse too. The only titles not on actual hardware at E3 as far as I know were Lococycle (which they hadn't started porting to X1 yet) and Dead Rising 3.
I played The Crew with an Xbone controller, but the Windows cursor floating over the game screen was kinda distracting