Some of our customers are using it to analyze the impact of re-arranging work spaces or to communicate why design A while more expensive is better than design B. We've been working on and are really excited about using VR to A/B test physical spaces. We do it for websites, why not for the spaces we live in every day?
a cool case study:
www.interiorarchitects.com/blog/the-future-of-architectural-renderings-at-ia-is-in-virtual-reality/
Still it creates an incentive for doctors to get a 3D ultrasound system because parents could go elsewhere otherwise.
You can imagine that, once it becomes more mainstream, architects or estate agent with a VR device would get more traffic.
(Better, give me an online estate agent where I can preview the house in VR before going there physically. A few photos are OK but they don't give you a sense of size or volume. And you can't look through the windows to check the view.)