The problem was we found it was not very accurate particularly in a room with a microphone a few meters away.
VR is more than a technology problem, it's a physics problem. The problems with your "room with a microphone a few meters away" could have been:
* Reflectivity of floors and/or walls -- hardwood floors, for example, bounce sound like crazy.
* Actual distance to the mic element -- sometimes you need to be closer to the mic than you wish; that's the life of someone who wants VR... you need to learn your own setup and deal with it until things improve.
* Quality and installation of the microphone. Expensive doesn't mean good, you need the right kind of element. A PZM-11 is a phenomenal VR microphone but only costs $100 or so. You also need proper wiring and equipment. For example, you might need preamps, mixers, etc. Many people use the Shure SCM-810 or the Gentner AP-800.
I guess my point is that there are
people who can get VR to work acceptably for them. It takes some work, money, and most importantly, a lot of honesty that you are not going to have that house that responds to you from across the room while you're playing the radio and asking for it to unlock the front doors.... it's going to work, but not the way it does in the movies.