Oculus and Samsung collaborated to develop Samsung Gear VR as a lite version of the Rift. The Gear VR is simply a case where a compatible Samsung Galaxy smartphone is slotted in front of the lenses. The visuals are a little grainy, but at $99 what more could you ask for?
Then there is the upcoming Sony PlayStation VR scheduled to release in October 2016 in time for Christmas. The PS VR has the chances to go big too. It is designed as an accessory to the PS4 console and does not require a PC for its operation.