Developers want to learn assembly and graphics programming, but modern systems abstract too much.
Curate kits with microcontrollers, displays, and tutorials for creating old-school demo effects. Include pre-printed circuit boards to lower the soldering barrier.
Hobbyists and educators would pay for well-documented kits that recreate the feel of 80s coding.
Start with a single-effect kit (like plasma or scrollers) on a popular dev board.
Risk is small market size if limited to retro enthusiasts.