I wanted something to occupy my mind while I would be recovering from major surgery.

Didn't want the Wii b/c I needed something that wouldn't require much physical movement so I got an Xbox 360.

I've enjoyed it and I can play movie videos on it. I think Playstation 3 can play bluray videos.

If you're looking for a fun activity while getting some physical activity the Wii would probably be good.

You can read all kinds of reviews online of all three systems and check out the games that each offer to see which you are more inclined to play.

Good luck!