Graphics capabilities of MacBook Pro?
I don't have a recent MBP, but in my experience the applications should run well. 

For games, I suggest to look at youtube videos. For example, Diablo 3 Beta Gameplay MacBook Pro.

You can find a good comparison of the graphics chips here:
Apple 15-inch MacBook Pro (Late 2011) Review

If you have time, I would wait about one month (until June/July 2012); the chances for new MacBook Pros being released are high.