I don't, but even then you would need to: have kids/pets and work the majority of the day around them while not at a fixed desk. If you work from a fixed desk, the cable is much more likely to be in a location where it won't be pulled. If you charge all day, and only use it intermittently from a sofa, you don't need the cable.

That's a market that exists, sure. Is it a big market? I doubt it.

The number of dads and moms that leave work early to pick up their kids at 3pm who then have to catch up on work in the evening in the family room (on the couch, at the dinner table) with their kids riding the dog around the aforementioned couch or dinner table is huge.

You're missing the part where the laptops last essentially all day. If the laptop's been charging, they're not going to need a cable.