For the laptop, you can use an HDMI capture card and OBS to use it as a second monitor. Keep in mind though that it’ll only support the resolutions that the card supports so depending on the card you may be limited to only 4k or 1080p resolutions.
Samsung Galaxy Fold probably has an even better experience because of the two screens and portable form-factor. But nothing beats playing on an original 3DS.
Software to use laptop/tablet screen as an external monitor
Basically the title, I want to use my laptop, which uses Arch Linux, and my tablet, which is an android one, as an external monitor for my desktop pc.
The best single-player DS game experience possible (lemmy.zip)
Kit:...