With the word "PlayStation" right there in the name, you'd think Sony's new PlayStation VR headset would only work with the PlayStation 4. Surprisingly enough, though, the headset seems to work in a limited "cinema mode" when plugged into any valid HDMI input.
After seeing reports of the headset's extra-Sony compatibility leak via Reddit, we put our own PlayStation VR headset to the test this afternoon. The headset easily displayed games running on the Wii U and Xbox One and even showed a Windows desktop when plugged into a PC tower. We can only assume other HDMI sources (cable boxes, mobile phones with output adapters, Ouya, etc.) would work just as well.
There was no discernible display latency or lag that affected non-PlayStation gameplay on the headset, and the PSVR's included headphone jack handled audio from these external sources just fine, too. The HMDI passthrough on the PSVR junction box also works with non-PlayStation sources, sending the raw signal to an external TV as well as the headset (though the processor box has to be plugged into a wall outlet for any of this to work).