Knowing full-well that the Xbox One controller won't be officially supported by Microsoft drivers until "early 2014," I bought myself one for PC gaming anyway.
I had a hard time choosing between the Steam Controller and the Xbox One controller, but I ultimately went with Microsoft's, with the reasoning that Valve's controller is targeted at being a keyboard and mouse replacement, rather than a supplemental controller. Not that it won't work as just a controller, but... that was how I rationalized my lust for Microsoft's fantastic rumbling triggers.
I received the controller today, and set out on the hunt for drivers or even rough hardware functionality on PC. Today. Not next year; today. A few hours of fiddling with Xbox 360 drivers and control-mapping software has gotten me no closer to the finish line.
Luckily, there is an individual with much more advanced driver and coding knowledge than myself (which, I assure you, doesn't take much...) that has also set it upon himself to beat Microsoft to the punch with some home-made drivers. Unfortunately, the fan-made drivers I expected to be in public release by now, have fallen into the cracks of the Internet. While the coder's Twitter account is still active, the last update regarding the drivers was "hi all, caught up on some thanksgiving stuff, will upload as soon as I'm home." A week ago now. Let us all share in a moment of silence.
Maybe next week... Maybe next year. *sigh*