Do you mean Microsoft? If so, it sure as hell hasn't scratched the business world. It's only knicked the consumer world a couple percentage points. I'd reconsider your position.
Further, this is kind of old and becoming a nonissue in today's world. With the migration towards non-platform-specific consumer usage of systems (ie. internet) I don't see as heavy of a need for some bloated consumer operating system.
I'm no huge Windows fan. I've used countless operating systems; C64, Cisco IOS, HP-UX, AS/400, Solaris, Mac OS, Windows 3.x-Vista, Server NT-Server 2k8, Linux derivatives galore, BSD. While developing/working on them and I can say I'm not really impressed with what Apple offers.
Apple is just a gimmick in the world of computing systems. You can claim that consumers aren't nerds that love command lines, but what do you think drives the media infrastructure that panders to all the fun-filled music and video that Apple users love to waste time on? It sure as hell isn't Mac OS.
Computers primarily run the world's business. Steve Jobs' goal is not to get Apple tangled up with "boring" business stuff. Hell, look at the stupid hipster getup the "Mac Guy" wears in the comercials. Jobs put the noose around Apple's neck when he set the goal of being consumer-orientated instead of business-orientated if his plan is digital world domination.