I agree with supa about running. In the demo, running around is pretty funky, and actually makes me lose some time (since it's timed on ps3). It can get annoying at how unresponsive walking is, but other than that the demo is great. I'm really considering buying this. My mom thinks I'll get bored easily though D:
Skate for me never got boring because of the freedom of it combined with being able to record and upload footage made it great to show off to friends to (trying to jump certain gaps, epic moves, epic crash poses, etc)
With Skate 2's moveable environment feature, I think it will take a lot more to get bored of it.
But that's just my opinion. :P