PLEASE NOTE THIS IS OLD, WAS A PROOF OF CONCEPT AND WAY BEFORE SONY ANNOUNCED OFFICIAL REMOTE PLAY
It is now possible to play your PS4 on any (reasonable) PC with Bluestacks and a customized version of the PS4 “Remote Play Android” app.
1. Download Bluestacks (http://www.bluestacks.com/)
2. Download this APK and install it (It should be associated with Bluestacks already so just double click it): http://forum.xda-developers.com/android/apps-games/ps4-remote-play-android-thread-t3068225
3.Sign into PSN and connect via internet to the PS4, no sync necessary