I don't think we've fully appreciated yet that "phones" are really the true embodiment of the original Personal Digital Assistant, i.e. an external brain that will augment yours in any circumstance.
Any portable device has been (or will soon be) replaced by "phones".
Yes, I'm constantly referring to my "phone" as my "brain's third hemisphere". It makes people chuckle but no one stops at that joke. It's completely "in the culture".
My late friend Hugh Daniel used to refer to his Bihn's backpack as his "LSD", for "Life Support Device". Like when we were leaving the house he'd shout "Oh no, I forgot my LSD! I'll be right back!" then run back in and fetch his backpack.
But it's okay, because of their multiple-tenancy practices, they only nuked the US offices, and a remote engineer noticed that the CI servers were down. He then drove halfway through the country to crawl through radioactive waste, just so he could plug back in the ethernet cable.
All these VR efforts are anticipating hardware advancements that make AR/VR glasses that are similar in size and form to sunglasses. I can't believe any of these companies (Microsoft, Apple, Nintendo, Facebook, et c.) genuinely think that AR on a phone/handheld or big ol' VR goggles are going to take off, especially since both aren't exactly new and both remain very niche—but solve that hardware problem, and those glasses will, 100% for-sure, be the next "smartphone" in terms of changing the role of computing in our lives, and any company not ready for it risks being left behind.
Or maybe it's the other way around - the less people leave home, the more uncomfortable they'll feel outside of it, and the more they'll want some piece of tech to assist them. If you're spending most of your time in a virtual reality where, say, a map can be conjured with a simple gesture, you'd want something approximating that IRL, no?
Any portable device has been (or will soon be) replaced by "phones".