Page layout and information hierarchy given the limited screen space.
I love Windows 7's feature, where you can just drag a window off the side to have it take half of the screen space.
Adding monitors is just one way to gain added screen space, of course.
It's been fantastic on my Incredible, but way more screen space would not be a small selling point.
And I'm not really giving up screen space anyway.
Have you ever wanted to have more screen space when using your computer?
As this was the first time where these two great actors shared the screen space.
That being said, there is a limited amount of screen space, after all.
But they don't all force the player's thumb to cover the same amount of screen space.
When nothing is happening, the interface takes up relatively little screen space.