no. an emulator will never be as fast as the native platform, so cutting edge games will never be playable on an emulator. older games will work though. besides virtual pc, there is also the open source bochs, which you can find for download on apple s website.
apple is not interested in making its own emulator for windows. and an emulator is usually a bad solution. if you really want to play windows games, then you need a windows box.