Frankly, if Microsoft had embraced EFI & GPT earlier, we could be able to install WinXP without any Bootcamp many years ago. This whole Bootcamp technology is a ridiculous dinosaur that shouldn't exist.
(Important note: That "just create a partition" advise won't work if you have Fusion drive, because Windows have no knowledge of that technology. Still, with few magic tricks, it is possible to have OS X installed on CoreStorage partition, and Windows on outside-of-CoreStorage HDD partition. That's how I have my Win8 installed on my iMac right now, no Bootcamp was ever involved.)
Also, as a person who plays "Dragon Age: Inquisition", "Far Cry 4", "Wasteland 2", "Bioshock: Infinite" on my 680MX iMac, I think the proposition of the topic-starter is not going to happen. Or at least, it's not going to happen to iMac and Mac Pro, because disregarding desktop gaming would be the most dumb decision. Who would possibly own the expensive black cylinder, if it didn't have a capability to run everything cool that is currently around?