“Better battery life. An automatic way to switch between discrete and integrated graphics and momentum scrolling.”
My now 9 month old 15″ unibody Macbook Pro has fantastic battery life. However, switching between the discrete and integrated graphics is something that is so painful (you have to actually close everything and log out to switch) that I never, ever, ever do it regardless of the application I am using. In other words, I do not benefit from being able to manually switch between the discrete and integrated graphics cards because I do not use the feature.
These new Macbook Pros figure out which graphics card should be used and switch automatically. We’ll see how this works in the real world but I think this is an absolutely fantastic update.
/via John Gruber.