So just to recap, at the moment we have bookmarks which are free, paper thin (because they're made of whatever piece of paper, ticket stub, etc. I have around) barely stick out from book but can stay with it, and feather light. When I start reading and stop reading I simply move it to another page. I can and do own dozens with at least one stuck in many books. I can have multiple in one book. They physically bring me to my last-read page.

Instead this is something expensive, thick, with a battery that could ignite and a knob I must turn, protrudes a lot and/or I must carry separately, slow to resume and slow to save.

This doesn't read like an April Fool's joke. This reads like an Onion or SNL skit mocking the tech industry. What am I missing?