Sage,
Yeah, Lebron did have quite a few plays in the video, didn't he? A couple of monster dunks and the "And 1" play. Looks like his jumpshot has changed (added his sig shot for Live '09 perhaps?) and great cutscene with Lebron and Gibson. I really like the new free throw mechanics as well.
Overall, I'd say that '09 is a solid improvement over last year's game. I liked how Lebron looks too, more detailed and I think with a beard. Attention to details like that keeps me coming back and playing again and again.
Definitely getting Live '09 this year. Looks like it's going to be a great year for NBA gamers this year.