It'd be cool to have a new modern retro system that embraces the spirit of the early "computer consoles" like the Commodore 64 while adding all modern conveniences:

• Everybody has the same system (devs need to target only 1 environment)

• Boot straight into a programming environment

• Limited OUTPUT that enhances creativity without the internal limitations that hinder creativity: Like a limited numbers of colors, but no bitplane crap or having to do sprite multiplexing etc

• Online, ungated app store where anybody can publish, like itch.io

• Reasonable upgradability (not so much as to defeat point #1)