OS/2 never reached the "commoditized" word in its day. Win95 stole its steam, and there never was a "gee whiz" app for it. OS/2 was relegated to play the Apple game, a small percent of the market but damn good money per sale. We all know what happened with Win95, it launched the Pentium into everyone's home.
Don't forget, Power PC was first to take 64-bits to the Joe Smoe home user. Radio Shack started these marketing trends when it brought forward the TRS-80, with its Z80 and BASIC operating system. Next up was Apple II with its 6502 processor and BASIC, but now with floppy drives and DOS to offer people serious storage for their programs. And then we had several others using the same 6502 processor trying to copycat them, and who knows how many flavours of DOS and BASIC were out there, but together they all played part to bring 8-bits to the home user. Then Apple stole the show with its 16-bit RISC technology, something unmatched by anyone else, and along came its "Windows" GUI, which today is still the de facto standard for the home user. Contrary to popular belief, the 286 sucked pondwater in comparison. Microsoft ripped a page from Apple's success and collaborated with Intel to make the 386, the first mainstream 32-bit processor, and Win3.0 a staple of the home users. Pentium was the first to take superscalar and Win95 to them playing along the same tune.
Fast forward to 2005. Now we have Longhorn simultaneously able to catapult wither AMD64 or Power 970's technology, or even both in parrallel. If IBM and Microsoft can get the Power PC sales to take off like the Pentium then one day everyone will pretty much want one. Otherwise Intel has an established market and would love to continue its partnership with Microsoft.