Nvidia should definitely continue supporting Linux. A reasonably large amount of their customers use their hardware in graphic farms, and their Linux support is to date flawless, meaning a lot of happy customers. Would nV be willing to lose a big portion of their market that is the Linux hobbyist and graphic farm operators? Doubt it.
*nix wasn't created to play games-- get over it if your Linux won't play your silly game.
Right, it wasn't. It was created for scientific jobs like 3D rendering, which is still up nV's alley.
As for games on Linux, Oolite is heckuva addictive, and it costs nothing.