I just downloaded it last night and I have already played at least 2 hours worth of it.
The above link is a collection of videos I took with my camera.
Things I noticed
Errors- They happen more often. I hit a shot to Ryan Howard and he missed it and Feliz dropped it trying to bare hand it.
Shadows- This is amazing. The shadows move during the game as time goes by. It is crazy how it works.
Players- They look at lot better this year. Their faces are mostly spot on it is getting crazy.
Stances- A lot of the stances seem to be very well done. I did not see any I had a problem with.
Pitchers- Get a jacket on base...really cool.
This game is a reason to buy a PS3....it is crazy to say that but it is 100% true.
If you want anymore footage just ask and I can take some more (example batting stances of the lineup)