You won't be using a DualShock 4 on an Xbox come November 15th, but that doesn't mean it won't work on any of Microsoft's platforms. Sony's Shuhei Yoshida recently confirmed via Twitter that the PS4's gamepad will be compatible with Windows for "basic functions." In response to inquiries about said functionality, he specifically pointed out that "the buttons and joysticks will work just fine." There's no word on whether the drivers will allow PC games to automatically see it as a DS4, though; Yoshida replied in the thread further, stating that folks will have to "wait for [a] field report after the launch." As Joystiq points out, third-party controllers can show up as Xbox controllers on Windows thanks to the XInput API -- something that's non-existent in the PS3's DualShock 3. And with that, we're left to wait and see what PS4 insights Yoshida will reveal next.
@Napo2k the analog sticks and buttons will work just fine- Shuhei Yoshida (@yosp) October 4, 2013
Sony PlayStation 4
Microsoft Windows 10
Microsoft Xbox One