With all that next-gen processing power, you didn't expect Xbox One to launch without a Forza title, did you? Here is Forza Motorsport 5, from Turn 10 Studios. It will be available at launch.
It looked pre-rendered to me, Owen. Actually the only game that didn't look pre-rendered to me was the NBA Live video. Even the other EA Sports offerings looked pre-rendered (which we've seen before - remember the Donovan McNabb video from ten or so years ago?)
However, Sony did the same thing - lots of stuff that looked pre-rendered and not actual gameplay.