This is quite a niche device however it has been making waves in the retro gaming community for some years now.
MiSTer FPGA Hardware | RetroRGB
Obviously the original hardware and a CRT will be the ultimate solution ($$), but curious to know if anybody here owns a MiSTer setup and can comment on the comfort connected to CRT or LED TV.
According to sources online it uses Linux behind the scenes, however solely for input mapping and AFAIK it isn't responsible for the graphics processing/video output.