When I want to show the real dimensions of the screen on my 17-inch Powerbook, I always load up Marine Aquarium and count the "Wow!"s
Anything that increases the wow factor is always good, in my opinion.
Powerbook 17-inch (Rev. A), 1GHz G4
OS X.3.2
64MB Video memory, 1440x900 resolution
FPS between 95 and 105 in full-screen mode.