It's also a godsend for gaming on Linux. As long as you take a peek at the wine appdb page for the game you're trying to run beforehand, they usually work great and with pretty good performances.

Though granted the games I play tend not to be cutting edge (but for example, Skyrim with a large texture pack and a full, heavy mod conversion such as Enderal works perfectly and with CSMT, with performances roughly equal to Windows).