I sometimes use a VR headset instead of a monitor but I do end up using a laptop because of the keyboard and touchpad.

I can conceive of using maybe a phone, an ultra light headset and a compact keyboard and TouchPad combined?

I'm usually connecting to a real computer over remote desktop however!

My workplace forces me to use a virtual windows VM atm, which I'm usually connecting from an MacBook Pro.

I recently wanted to try using such an XR glasses (viture) and just use a Bluetooth keyboard/trackpad and connect from my phone. It would make teethering unnecessary as an additional plus.

While it worked, it was super janky because mobile devices are still not optimized for desktop use... The VM screen was effectively limited by the phone resolution which was mirrored by the glasses. Couldn't get it to work without the mirroring...

If it was less janky I would definitely use that for some business trips. Currently? Nope.