We developed a product for editing architecture models in VR (VRsketch.eu). I wonder what company did you try to work with? The potential is enormous, a bit unclear how to sell those though, architecture is a tricky market :)
I think that VR is one of those things where the best way to sell it is to do live demos. Most people have never tried VR, and it's an entirely new paradigm, people can't even conceptualise it before they try it.
I never seriously considered buying a VR headset until I tried an HTC Vive for the first time. I didn't end up buying one, for financial reasons, but I considered it.