I know that lots of people are very Microsoft-averse, but this is exactly what the Surface is.

My all-in-one dream is a laptop that has a double-sided screen on its lid. When opened, it functions like a normal laptop. When closed, it functions as a tablet. Content is passed back and forth between desktop & tablet mode. Example use-case: I'm surfing the net in laptop mode, and find some longform content; I close the lid and now it's in tablet mode, ready to read.

A double-sided screen might seem like overkill, but it's the only solution I can think of that solves all my personal laptop/tablet-hybrid annoyances, namely (a) kickstand, (b) they often come in two parts, tablet + keyboard, and (c) if you can fold the keyboard over, now the bottom of your tablet is a keyboard.

Asus made a clunky version[1] of this form-factor, but I'm waiting for someone to do it right.

[1]: https://www.youtube.com/watch?v=rmpNYWEz-Bw