One of the vehicles in the vertical slice was the jetpack. You had to hop, thrust, descend and land on a series of increasingly smaller platforms from high in the sky all the way down to near the ground. Given how high you could go the cities were pretty detailed. They had city landmarks and everything.
Oh and the game could pull from the Wii weather channel and give you real-time, geographically accurate weather for the real-world locations. Twas pretty neat.
Where is this video? Cause all I see is that seven second video of mountain terrain. Also if I understand correctly there have been 720p tech demo done on the OG Xbox, I just don't see how the spec difference between the xbox and wii can fulfill the broad descriptions provided.