Since there are no wires on your back, wireless headsets are more comfortable to wear. There is also a slight chance you could trip over the wires and knock over your TV or computer. Check out this cable management system if you want a safer PC VR experience. You can put the cables on the ceiling so you’ll never trip over them again.
You can also play VR games with a headset and don’t need a PC. Only to turn on the headset, and you’re ready. But the PC version has slightly better graphics than the standalone headset. The anti-aliasing in the PC version is better, and there are a few more details.