Doesn't really answer the question, in my mind. I'd like to know if you're getting officially licensed versions, and not genetically modified knockoffs.
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OEM keys are tied to a single piece of hardware.
Lol, so in essence, I could reinstall Windows 7 as many times as I want as long as I reinstall it on the same Mac with the same hardware? How does Bootcamp tie into this? Does the activation key ties itself to hardware identifiers on the system of install?
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Because I want a really nice Mac for a main machine first, and a Windows PC for the occasional Windows game second. I'm not buying an iMac because I want to play a lot of games in Windows, it's just a nice benefit. One that will make me wait on buying a new iMac until I can have a 3TB Fusion drive and still use bootcamp.
To the OP, I've used my 2011 iMac 21 inch with Windows 7 + Steam for a year and a half, and have no complaints. Everything works fine.
I don't think Windows 8 will be officially supported for another 2-3 months.
Even if Windows 8 is officially supported in Bootcamp, I will continue to avoid it.