@neauoire A friend and I did a little thing where we reverse-engineered the Moleskine "smart pen" to grab output and saved output and convert it to SVG. We made it into a wonky screenless CMS where each physical page in the notebook is a web page: https://gitlab.com/bhowell/penpub
Demo site here: http://penpub.ink/
You can find the pens used for cheap sometimes. And you can print your own encoded paper on a decent laser printer (although the professional stuff looks and works slightly better).
We wanted to do more crazy interface experiments but we got busy with other stuff.