The Korg NuTube would be an interesting basis for a new display device. https://korgnutube.com/en/ https://korgnutube.com/en/ While it doesn't have the cool vi

The Korg NuTube would be an interesting basis for a new display device. https://korgnutube.com/en/ https://korgnutube.com/en/ While it doesn't have the cool visuals (Feature request for 2.0?) it can actually do tube-y things in your circuit. I imagine a VFD magic eye simulator would be possible and you could actually use it as an active component.