You did not buy the OS...
...you only bought an UPGRADE to the OS... Apple does NOT sell the OS wholesale at all. You have to actually have a working Macintosh in order to use the retail copy. Sure, the disk in the box performs both a "full install" as well as an "upgrade install," but so does your upgrade copy of Vista, XP, etc... The only difference is that Microsoft requires an activation key, and validation of previous purchase (insert old CD or type in old CD key to validate your upgrade), and Apple can assume you have a Mac, and since all Macs come with OS X (Not all PCs come with Windows) and doesn't need such a process, making the "upgrade" status less obvious.
If the EULA does fall (a HUGE if, as it would have MASSIVE rammifications throughout the industry, and no small judge is likely to risk the backlash of such a decision without federal appelate backing) then Apple will simply relable all the existing copies "Upgrade" (reflecting it;s actual status) and then start selling "full versions" for the appropriate price (likely between $300 and $400 a copy, reflecting appropriately their profit margin on a system).
...and for those of you STILL saying things like: "Get a grip, get a life, get a Mac! Or, buy 3 PC's for the same money......." You still fail to make actual performance/price comparrisons. If you DID, you'de know that each Apple machine falls nicely between $100+- of each equivalent HP, Dell, etc machine. Yes, you can get an el-cheapo PC notebook for $500, and the cheapest Mac notebook starts at $850, but the cheaspest Dell that compares to that $850 mac is a 15" monster costing over $1000, weighing nearly double, and has only a 2 hour battery life (and lacks bluetooth, firewire, an SD reader, backlit keyboard, is made of cheap plastic, the warranty costs more, and the vid card is inferior compared to the CHEAPER Mac). The higher in class system you go, the cheaper Apple gets. At the top end, their systems undercut Dell's pricing by $400+. Some MacPro desktop configurations are $2,000-3,000 cheaper than the competition.
What good is a $500 notebook if it can barely meet the minimum specs to run Windows? If it's a "netbook" equivalent in a larger form factor, Apple has made it QUITE CLEAR, that is NOT their target user base, they're only interested in people who either use lots of media (manage tens of throusands of pictures or edit home videos), or people who use the machines professionally. Low end users are only profitable until the first time they call tech support, and low end machines that can't properly handle the OS and applications cause users to call support more frequently. Apple will not lower their standars of Support to Dell's level, now will they distribute different "versions" of their OS crippled to support the hardware underneath it.
If you want a PC for your kid for researching school project and word processing, get them a cheap machine with Linux. If you have a grandma who wants to video chat and online shop, but that's about her level of technical understanding, get her a cheap PC. If you are a family, have a camera and camcorder, and communicate regularly with other members of your family who do the same, and maybe want to actually play some games on that machine as well, than an Apple Mac is in 80% of cases the CHEAPER option.