I don't see a near future where the Vive is something I'll invest in, purely because I don't have the physical space to dedicate to it (not even temporarily).
I've tried the Vive and it is very cool, but I do wonder how much physical space will be an issue for its take-up in the UK. We've got a decent size house by UK standards (4 double bedrooms and 3 reception rooms), but, with two kids, I really can't think of anywhere that we could sensibly put one.