If you are trying to decide whether or not to get a MacBook or a MacBook Pro based on the video card, you might want to take a look at this video below. At the current moment, you cannot switch from the energy saving integrated chipset to the high performance chipset without logging out and back in again
That sounds like areal drag for people like me who would want the energy effeciency on the road, but then be able to plug into my large screen monitor at home and crank up the video power. Logging in and out is a drag. I only do that kind of stuff when there are software updates
