Evryway is currently creating a selection of prototypes, small and large, across a variety of hardware.
Orbitals is a very small prototype which supports chucking planets around a star. Currently has support for Vive (view and interact) and Tango.
Painter is a multiplayer prototype which allows participants to chat, walk around and paint (with the Vive). Tango, Rift and Vive can all view and walk around the scene, Vive can paint using the wands.
Portals is the base prototype for the holodeck experience. Currently, portals supports voice chat, floaty heads, portals from one space to another space that you can walk through (and look through on Tango). Supports Vive, Rift and Tango.