This is a 4K monitor that cost roughly $500 along with a real keyboard and mouse.
As far as portable screen setups, we have a portable monitor, which slips into a backpack like a laptop. It’s about the size of an iPad.
I’m not saying any of this to criticize your setup at all. I agree that it’s a use case that probably works for some people.
Still, it’s clear that traditional alternatives exist, and they lack a lot of the downsides that VR has.
You can even buy laptops that already have two screens built-in like the ZenBook Duo.