FOVE VR differs from the likes of Oculus Rift and PlayStation VR because it offers interactive eye-tracking. Inside the headset is an infrared sensor that monitors the wearer's eyes; offering both a new control method and an edge on its competitors when it comes to realism.
With FOVE, simulated depth-of-field is possible, due to the system knowing exactly what you're looking at, and as a result, the virtual should appear more real.
It's also the ultimate VR lovechild, thanks to investment from Samsung Ventures, Fove claims it will use HTC's Lighthouse tech for full on room tracking. It's not the only deal that Fove and signed: it also makes use of the Wear VR software platform and is compatible with Unity, Unreal, and Cryengine game engines.