For whatever reason, the Apple Macintosh is very, very good at this. Running Windows on a Mac is something that has been a common practice for years -- a fact that has no doubt calmed the concerns of some people who want to move to a Mac but are concerned about losing their Windows software.
The virtualization on Macs has been so good, in fact, that Windows runs very fast rather than bogged down like you might expect. That's some good work.
Of course, I still prefer my Windows machine, but Windows 8 might just cause some people to start looking elsewhere.