I don't care who does it! Codeweavers (http://codeweavers.com) allows some windows apps to work under Mac OSX or Linux without needing Windows at all, but it doesn't work well still for graphics intensive apps such as flight sims. I don't even really mind buying Windows though as long as I can run my Windows app without needing to log out of OSX. So if Parallels manages to support DirectX 9 well enough to run flight sims, I'd be pretty happy. I don't expect a high quality native Mac flight sim until Macs become much more popular than they are.