You just gotta grab some software
Thanks to some software created by InhexSTER, the PlayStation 4's DualShock 4 can be used with a PC. The guys over at PC Gamer have tested it out, and they explain how you can get it working. Right now the wireless functions seem to only work well with Windows 8, but with the cable attached it will work with Windows 7.
Would you game on your PC with a DualShock 4? If you have a PlayStation 4, it can't hurt to try it, but I think I'll just wait for the Steam Controller.