https://gameglass.gg
Another sink to pour your money into for Star Citizen. It works for other games too, but if you search on the marketplace, there are 134 shards for Star Citizen, 23 for Elite: Dangerous, and then about a dozen more for three more games. So Star Citizen utterly dominates this service.
That said, the above is the user-generated marketplace. The official shards work with many more games:
So what this thing basically does is turn your phone or tablet into an input unit, like the Wii U's tablet.
Only thing I can't tell is how they'll work with VR. Probably not at all. So VR kills several things including above all multi-display setups, and then cool stuff like this. On the other hand, the in-game switches and menus will always be more immersive than hacked in peripherals like your tablet, so ultimately it makes sense to skip all this stuff and just invest in a strong system and a good VR headset.