I always assumed that Facebook is playing the long game with VR, with the end goal being a re-imagined Second Life.
They need to wait until the technology is cheap/mature enough though, which is probably 5-10 years out.
Seems cheap enough for mainstream. Considering the game console price point.
The comparison consumer-ready technology would be an iPhone or a Nintendo Switch which are sort of out-of-the-box experiences mainstream consumers are quickly getting used to.
As soon as you unbox the Quest you're ready for the onboarding process (which is quite enjoyable btw). No PC or additional hardware required.