Apple Corp is now one of, if not THE largest single company in the world. Yeah, they can force you to do a lot, and if they remain large as they are, they'll get away with "IT" for as long as they can. What I find interesting, is, for the longest time they were the underdog to Microsoft and the PC market, and people simply found it to be a "culture" or way of life to be different and "cool".
Microsoft really did themselves a huge favor by making Windows 7 what it is, and how much more efficient and reliable it is from their longtime stronghold via XP. I personally find Windows 7 much more reliable and stable than the Mac OS, and I can put whatever hardware I want in the machine from any major brand.
I'm not biased to Windows or MAC. If Ubuntu were further along, it could be a real contender. Unfortunately, Open-source has the drawback of anarchist-type development rules (relatively-speaking), which will taint the Open-Source reputation for years to come. Consortium methods don't always get the buy-in from everyone. Until then, Windows and Macs both will rule DAW's for years to come. If Dell/Microsoft win over Apple fans, I think they'll crap in their own pudding soon enough. They've done it before and are VERY GOOD at ruining their own reputation.