Ok, let's get things straight. Watching this is
nothing like walking to the park and standing under a tree. It's cinema. It's a completely different experience. You wouldn't say "why would you watch a Tarkovsky film when you can just go to Russia?"
So, what kind of role could VR play in our lives? Creating more immersive, interactive cinema. This is an old idea from the 60's: http://www.vasulka.org/Kitchen/PDF_ExpandedCinema/ExpandedCi....
What I wish you said, however, is that we have a responsibility to remember what we need to do for people. The argument for standing under a tree rather than watching this could be: you can have a totally enveloping, tranquil experience without burning coal, without fracking, without necessitating the employment of exploited factory workers, without supporting the mass extraction of resources (and corresponding environmental destruction), and without adding another broken gizmo to the landfill in 5 years.
For those working on the technology, rather than building escapist fantasy worlds, you could work to make our actually existing, real, external world (note: fallacy), which is dysfunctional for billions of people, more functional. You could also refuse to build escapist fantasy worlds for people who themselves could be making a difference in the world rather than consuming resources and funneling money to the wealthy corporations in exchange for "virtual goods."
And you could also do this through VR. HMD's don't even necessarily need to display virtual worlds. Virtual worlds don't need to be purely hedonic.
All that said, maybe lying on a tempur-pedic mattress and staring up at an artificial autumn-scape is exactly what someone needs. Who can say.