First version of a new fantasy console/computer from Lexaloffle is available to purchase now, on sale till the end of the month.

I haven't tried it yet (other than limited messing around with the Picotron playground in the past), but am excited to check it out soon.

From their website,

Picotron is a Fantasy Workstation for making pixelart games, animations, music, demos and other curiosities. It has a toy operating system designed to be a cosy creative space, but runs on top of Windows, MacOS or Linux. Picotron apps can be made with built-in tools, and shared with other users in a special 256k png cartridge format.

Excellent video introduction by Krystian (Lazy Devs) here.

And like PICO-8, you can play anything posted to the BBS in your browser here

I enjoy the limited environment, retro-like environment myself. It limits my choices to stay focused on small projects, while providing a fairly robust and modern environment to work in.