Actually technically Wine is a neat wrapper for closed source programs since if the game was a native Linux game, the company would sooner or later give up on updates and then the game would break due to ABI compatibility issues. With Wine people there's the opensource community writing updates so it will keep being compatible with the newest and shiniest Linux releases. The programs are coded against WinAPI and thus they will keep working as long as Wine is maintained and regressions get fixed.
Originally Posted by tball
Note that I'm not saying native Linux games are by any means bad. I'm just saying there's more than one point of view on it that has sound reasoning.