Emulation of windows sucks on Linux
I have been following the WINE project for quite a few years. These guys are doing an incredibly hard job in trying to keep up with a moving target and basically re-writing an operating system to run natively on top of another operating system.
Many people think of the WINE project as an emulator for windows yet the very name of the project explains that it is not true. The name WINE is, as you most probably know, a typical open source acronym for Wine Is Not an Emulator. The very goal of the project is to recreate, without breaking any law, the functional equivalent of the windows operating systems libraries so programs written for windows can run natively under Linux.
While these people have made some major inroads towards that goal, they are finding it a bit bigger perhaps than what they originally thought. Nevertheless there are a great many windows programs which run quite well, sometimes better, using the WINE developed libraries.