Pixel Wrangler: HDMI to Whatever

Here's a video of it in action [1]: "[Rick Astley's] "Never Gona Give You Up" rendered as a B&W dithered video on a Mac Plus"

[1] https://www.youtube.com/watch?v=i3MihXSwIDs

I for one would actually be more interested in a "Whatever to HDMI". At the moment there's just too many things you need to convert any signal to HDMI: An upscaler (FrameMeister, OSSC) for S-Video, Scart, etc, the RGB2HDMI for older computers (and in some cases, like the C64, even more hardware to plug into it), the Graphics Gremlin for retro PCs, a VGA2HDMI thingy for anything else VGA, ....

Get me one device with a dozen input choices (possibly modular), a powerful FGPA/CPU combination for processing, open-source firmware and HDMI-out...