I think Mac users are driven by the hardware. People get excited by a Macbook or whatever, not the operating system. Not everybody can afford those, so the chances of OSX ever getting anywhere near Windows market share are virtually zero.
So, if you bought a MacBook with a blank HDD, and no OS X, you'd feel excited then?. If what you say is true, then why are SO SO many people, getting so worked up about the coming of Leopard?. I feel your comment is _severely_ flawed, in every aspect; it is the _combination_ of beautiful hardware and beautiful, simple to use, hassle free software, that makes a Mac, a Mac!. Harmony between hardware and software, is what Mac is about, not the sole benefits of either one, without the other - that just wouldn't work out.
As a final point; Mac is about quality, not quantity. You could sell 1,000,000 PCs with Vista on them, and 1,000 Macs with OS X on them, and Mac would still "win", if there is such a generalisation to be made, because Apple work MUCH harder, and tweak their systems far more meticulously, to ensure the user has a frustration-free and enjoyable, addictive experience. How can enjoy cleaning up spyware, de-fragging your hdd and waiting for windows to start responding again?. LOL!.
I think you will find, that Steve Jobs is not in it for market share - he is in it to produce beautiful products, for people who, ultimately, know there is a major difference between "Just about works" and "Just WORKS". If he were so bothered about OS X market share, then he would be producing en-masse, millions of PC-installable copies of OS X.
Time will tell, but you also need to keep an open mind about this, and read a little deeper into the situation; consider how *you* would play it, if you were in his shoes...