I am writing this in a Macintosh program called Pages. When I finish, I will copy the text and paste it into Microsoft Word for Windows. That doesn't mean that I will copy the column onto a USB drive and transport it to the Windows computer that's gathering dust in back of me, because I'm running OSX Mountain Lion on the Macintosh -- and Windows 7 in a window right next to it on my iMac.
Few will be bowled over by this bit of magic. Like me, some have upgraded and used every version of Parallels Desktop since its early, clunky days. It's the best way that I know of to run Windows and Mac programs side by side on the same Macintosh PC. There are other, cheaper ways to do the same …