Yes, games. Works quite well for me. Not only for some old ones, also recent ones work very well. For some games, the trick is to use Wine's "desktop" windowed mode to make them work nicely.

Some games have a Linux binary as well (and unfortunately no source code), and yet the Wine one will work better. The Linux binary will be like "old-version-of-some-library.so not found" or "could not connect to X server", while Wine acts as a rock-solid stable graphics and gaming API!

The only sad thing is that relevant versions of Internet Explorer don't work in it, that would be very handy for testing something in multiple browsers.