I have no idea what this is, but it looks cool in a retro way. This is what I found in a search:

https://en.wikipedia.org/wiki/Picotron

The article describes it as a “fantasy workstation”. I guess it has no practical application and is more of a hobby or a technology demo?

From https://www.lexaloffle.com/picotron.php:

Picotron is a Fantasy Workstation: a self-contained creative environment built for imaginary hardware. Create cute Lua apps that can be run inside Picotron as windowed userland processes, shared as cartridge files, or exported to stand-alone HTML apps.