I've actually been using a pen display and an iPad as 'portable monitors', guess I'll be looking into getting a portable monitor. Do you have any recommendations? Only requirement is 2/4k.
There are quite a few portable monitors in the market, I'd group them into 2;
1) Those provided by big brands with (usually) proper warranty & support. For some reasons, many of these don't support video over HDMI input, only USB-C. So IMO they are targeted toward laptop users, not desktop PC users (unless your GPU support video output over USB-C). They are: Asus, Lenovo, Viewsonic, AOC, Gaems, etc.
2) ..And non branded ones, usually with questionable warranty & support. They are usually built around existing laptop LCD panel. They actually provide good display quality & more options in terms of resolution & size. Many of them use mini-HDMI, so they work well with Desktop PC. Some brands are: Eyoyo, Elecrow, Zeuslap, Magedok.. I bet you never heard them before hehe (But some brands like Eyoyo and Elecrow are popular among Raspberry Pi builders). They are plenty on Chinese marketplaces like AliExpress.
I myself uses Zeuslap 14 inch touch screen at the moment..
You can read some info here:
https://smallformfactor.net/forum/t...-work-and-gaming-recommendations.2089/page-41 - there are also some DIY solutions if you're adventurous