I think this is really cute and wonderful. I think there's some room to improve here, e.g. an AR ghost overlay of previous frames as well as ML extracted frames

I think this is really cute and wonderful. I think there's some room to improve here, e.g. an AR ghost overlay of previous frames as well as ML extracted frames from pure paper without having to print a template (both of which I believe are feasible). But overall I love that people are experimenting with this stuff (and wouldn't want to react negatively here in any way to discourage this type of work). Some might argue moving from digital to pen and paper is a step down but I'd argue the opposite. I'd love and look forward to a possible future where we move digital advancements into the analog world in this way. As Theil says you can barely tell the difference between this world and the 80s if you remove cell phones and computers, but things like this are a cool way to hopefully get us closer to computers aiding more natural forms of interaction.