I disagree with the author that I can see a lot of value in improved social interactions and virtual workspaces in VR once the technology gets there. You can already see glimpses of it with today's hardware and software. And, it makes sense the VR/AR will be the medium to contain all other mediums. But, that doesn't mean that we need to live in "metaverse" as defined by Neal Stephenson or how Zuck imagines it.
Yes, you'll be able to create your Facebook (or Meta) avatar, and use it to log into work meetings and social events - but that's not much different than using Facebook Login today. There are already a bunch of siloed social experiences in VR, like Facebook Horizon, VRChat, Altspace and Rec Room.
I don't see FB or any other of these apps moving to open protocols that would allow decentralization and federation, just as todays "2D" social media companies, including all the ones owned by FB, aren't doing it.
If Zuckerberg is serious about a federated metaverse and open protocols, he should start by opening up Facebook, WhatsApp and Instagram.
In the end, the metaverse will be the internet, but mostly experienced through the medium of VR/AR.
Edit: Typos