I do most of my older gaming on a 20 inch Sony Wega CRT but every once in a while I run the games through my Epson projector which projects a 127 inch image, just for the hell of it (it's always hooked up, just a matter of what switch I hit). It's just great to see the games that BIG, even if they don't look wonderful.
And I agree the pinball and shooter games lend themselves to it pretty well!