I agree. This has been my setup as of lately https://imgur.com/a/1CjpS8G

. Portable 4k screen (the glare in the photo is not really visible in front).

. Custom mount for the laptop and a

. Wireless thinkpad keyboard with a trackpoint (which I love).

The cabling management has improved now, but this setup gives plenty of screen real estate, both displays are touch, and in comparison with a tablet where the applications context is lost the majority of time, here I can be more productive and is a joy to work with it.