I have a Rift and I bought a couple of art programs for it (Medium and Gravity Sketch). They are lovely for doing character work but if I want to do anything with any sort of precision it is very hard to work with it.

The biggest issue for me is that I generally do a hand sketched dimensioned drawing and coming out of VR to refer to it breaks the work stream.

I guess I could scan and import it but that isn't ideal either.