[lycopodiopsida]

Another possibility: if you own a mac, almost any ipad manufactured in last 6-7 years can act as an external screen.

[diffeomorphism]

Another possibility: if you own any computer and any tablet, they can act as an external screen. That has been around for years before apple sherlocked it.

[elkos]

I do have an Android tablet mostly sitting and a Linux laptop (running KDE) can I do it in a really seemless way?

[butt____hugger]

Only through apps that work as RDP/remote desktop. You can't use native X/wayland screens with Android unless you root it.

[elkos]

will check it out

[bentcorner]

I use Deskreen with Windows, it has a Linux version that probably works similarly. I think it leverages browser streaming tech.

https://deskreen.com/

Easiest way to get it working is with a dummy plug (because it just casts displays, it can't create one), but maybe there's more options on Linux to fake a display in software.

[elkos]

Will check it out

[lifty]

Another possibility. Get a Quest Pro VR headset.

[prox]

There are apps like Duet and a number of others for Win use as well.

[wahnfrieden]

also good with luna display