I've had this experience several times. The one that hurts the most I think was one I worked on with a friend called VRwalkthru that we wanted to sell as a serv

I've had this experience several times. The one that hurts the most I think was one I worked on with a friend called VRwalkthru that we wanted to sell as a service to real-estate agents and people selling their houses. You used a special camera to take pano photos throughout a property and keep track of your movements and directions in an app (it used accelerator / compass data). Then the photos would be converted to photo-spheres and arrows would be added you could click on the move to the next spot like google street view so you could "walk through" a property listing. We got a prototype working and sent cold emails to a bunch of real-estate agents and got... nothing, maybe one luke-warm response. We eventually gave up. That was about 2011, then a few years later along came matterport and I see it on practically every listing I look at.. oh well. I guess we didn't know how or who to sell it to, or it was not good or professional enough, I don't know...