Ask HN: What's your opinion on a VR/XR business?

A friend suggested that I join them in a VR/XR business, It’s not actually a formal business yet, the company hasn’t even been legally established, but they have developed a solution. He told me that three people have contacted him about buying the solution (though they didn’t want to pay all the fees), and one wanted a partnership. They haven’t done any marketing yet, but users are finding the website online.

I’ll join anyway, but I want to know what the market value is and what really makes a VR/XR business successful, one that could allow me to quit my job.