Dex is actually useful and I see people using it in business settings somewhat often. Basically anywhere a chromebook is useful Dex also fills that niche surprisingly well.
on android there's also windows connect or whatever it's called so you can pretty seamlessly use your windows laptop and samsung phone side by side. Everything syncs nearly instantly, including texts/phone calls. It's pretty rad when it works properly.
At that point, why are the peripherals not just accompanied by device with a CPU & internet connection?
I plug the Viture XR pros into my Samsung phone and put them on, I get a beautiful 1080p screen projected 3m in front of me, the phone becomes a touchpad, and I have a low profile bluetooth split I type on. Very comfortable, very usable everywhere, including while you're walking around (not that I do this very often). It looks a little dorky but less with every iteration, and way less so than having an Oculus on your head. Not to mention that the quality of the displays is incredible.
I think he posted an appreciation post on reddit about it.
Neither the less, it's quite an achievement. Especially when it was a well received plugins