Well, what happened so far is that whenever gaming was involved, standards were ignored, proprietary implementations were introduced and documentation was missing or conveniently missed the important bits.
The AT and ATX standards for example, you can thank IBM and Intel for introducing them back when "gaming" on x86 was not yet a big thing.
When looking around at those "gaming" systems what you see is that color codes are skipped, big companies have proprietary connectors on some of their hardware and sizes of some boards do not fall into any standard size category in order to either save manufacturing costs or promote desktop cases that support their new unneeded board size. Essentially the standards are thrown out of the window.
In the past, things were even worse with gaming PCs. There were a dozen or so of "gaming computer" makers (atari, amiga, amstrad, sharp, nec, microsoft, sinclair, etc.). Well, none of them maintained any sort of compatibility with each other, even when using the same hardware. Everything was proprietary so that "gamers" would be forced to leave their games behind if they would choose to get a computer from another maker.
Now, when new tech is introduced it's sensical to have new standards come with it. Of course whatever uses the said new tech will also use the new standards that come with it. Just because "gaming" systems are usually amongst the first to use the new standards doesn't mean that gaming systems were responsible for introducing them. It's just that "gaming" hardware is usually over the top, with bunches of new features of all kinds (that rarely are useful in practice) and a perfect candidate to host overpriced new features that budget systems can't due to cost considerations.
In the end, when you leave it to the gamer, standards slowly vanish, proprietary stuff slowly appear and in the end you more or less have a similar situation to consoles and the likes.
Edited by PsyM4n - 3/30/14 at 2:57am