Nintendo Switch to have VR: the gamepad is also a VR screen.

[Pyro as Bill]

VR = 3D + Gyro

I think Nintendo are going to use parallalax barrier lens (3DS) to do their own version of VR.

The new 3DSXL has head/eye tracking to improve the 'sweet spot'. The sweetspot combined with a gyro for changing the camera is what VR is.

You can use one display and it doesn't have to be split in half. The headset will probably need it's own screen but the VR should be able to be turned down/off if you feel sick.

It will probably feel like playing down a spyglass/telescope which will be perfect for Steel Diver 2.

Metroid - Visor
Mario Kart - Crash helmet