Are they not the most used OS on the planet, yes they are and loosing some share to Apple, true but that is only because of the SUPERB HARDWARE APPLE BUILDS and IMO the only reason.
I disagree. Apple's operating system is excellent and I think it has at least as much, if not more to do with why people buy Macs than the hardware does.
I realize Mac OS X might seem unfamiliar to someone used to using Windows their whole life, but I can tell you as a person who works with Windows XP, Windows 7 and Mac OS X EVERY day, Apple has something really special. With the Dock, MULTIPLE desktops and trackpad gestures, I can get just about anything done in 1/2 the time on my Macbook as I can on the PC. I can move between three separate desktops with the flick of a finger instead of bumbling through the task bar. I can glide through the dock and drag/drop files onto the apps I want to open then instead of fumbling through the archaic Start menu with nested folders. Everything about the Mac OS is better IMO.
That said, this is why I am encouraged to see Microsoft thinking outside the box with Windows 8. They need to. The tired old Start button system is obsolete and it was never particularly great to begin with. Linux surpassed the Microsoft GUI in usability and efficiency more than 10 years ago. They had multiple desktops, miller columns etc.
Some people are just so used to the goofy Windows shell and UI that they don't realize how much better it can be done. Microsoft has the right idea trying to do things differently. There is plenty of room for innovation here. The people who want to cling to the Windows XP and Window 95 style need to stand aside and let Microsoft work here.
This kind of thinking is what got us Windows Phone 7. That's an example of what the NEW Microsoft can do when they aren't afraid to throw away the moldy old blueprints. That is what Microsoft needs to do in order to evolve.
If you want to use Windows Mobile 6 and Windows 7 or XP forever, be my guest. Just get out of the way. Microsoft has been held back from doing great things by this relentless need for backwards compatibility to the year 0 for far too long.