I've actually thought a great deal about this. I think the solution is a keyboard that exists both IRL and in the virtual space: some sort of cheap system to ke

I've actually thought a great deal about this. I think the solution is a keyboard that exists both IRL and in the virtual space: some sort of cheap system to keep track of its relative position with respect to the VR headset would allow a user to look down and "see" the keyboard in virtual space as it exists in reality. There are a number of unknowns that would need to be probed if somebody were to pursue this solution directly, but I don't work with VR stuff so I can't see if it would actually be useful in practise.