Sorry to burst everyone's bubble, but
SPOnG reports that a former Free Radical employee has verified that the footage is genuine, but that the game has already been passed to a new developer. Worse still, the tech that allowed you to fly from the ground to air and then into orbit stayed with Free Radical. The new developer, the source says, will now be using cutscenes.
Then again, it is just a rumor from a former Free Radical employee, but I'm not all too skeptical on this one.