A few notes and corrections: While the iTunes store is currently Mac-only, Apple's intention is to expand into the Windows market by the end of the year. (Apparently, part of their thinking was to work out any glitches in a small market, which Mac is.)
Also, Apple is not selling MP3s. It uses a different codec which is generally regarded as superior. It's still compressed, but what you buy should sound a lot better than a 128kbps MP3.
Finally, while Apple may have only 3% of the personal computer market, I believe the iPod is the best-selling portable music player. I can't vouch for the company's long-term financial viability, but if all you look at is its PC market share, you're missing a lot of what Apple has going for it.
Also, Apple is not selling MP3s. It uses a different codec which is generally regarded as superior. It's still compressed, but what you buy should sound a lot better than a 128kbps MP3.
Finally, while Apple may have only 3% of the personal computer market, I believe the iPod is the best-selling portable music player. I can't vouch for the company's long-term financial viability, but if all you look at is its PC market share, you're missing a lot of what Apple has going for it.