Speaking of webm's and all the graphical faffery of the last day or two been going through what I've got installed and just for shits and giggles booted up Gears of War (yeah not on Steam I know). Bizarrely it doesn't register resolutions more than 4 figures but it does have a 400x300 resolution. Yes 400x300. It plays like a freaking 3D SNES game and it's awesome. Saj would be proud if it weren't for the upgrade.
Speaking of low resolution games, you can play Strider at 320x200
Ends up looking a like a PS1 game: