What is pcvr's fundamental problem?

[CharlotteFilemdar]

What is the fundamental problem with PCVR that is causing concern about its future? How does the business model of PCVR differ from standalone ecosystems, and why are hardware sales not where the money is at? Additionally, what is Valve's role in PCVR's business model, and why are devloperbook other companies developing their own standalone ecosystems?