The newest player in the rapidly crowding HMD space, the Totem.
A very nice feature is pass-through optics, allowing the user to adjust the mix between real-world and virtual-world visuals, and/or to switch between them as necessary. This significantly moves towards a resolution of the “Where’s my keyboard?” conundrum.
Kickstarter campaign just launched Sept 15, 2014.
These early prototypes look very Kill-Zone 2-ish.
I wonder: do they glow in the dark?