It really comes down to having a phone that is “also a phone” and runs a computer operating system. Sure, you can get a computer to run Android, but it’s a weird case of almost as Android is truly optimized for phones and touch screens. I have not had any computers, as such, with touch screens, so there might be some not-Android Operating Systems that can deal with such (for me, Windows need not apply. I stopped trying to use Windows and I found I stopped cussing at computers. Mostly. And even then the cussing often had a solution other than the Gates-Jobs duoploy of “F*** you, do it MY/OUR way, peon!” To Berkeley with THAT [EXCRETA]!) Maybe *buntu or Mint can do it, but I’ve had no reason to go find out.
However, once touch-screen and pointer are not eXclusive-OR (and the lack of one or the other isn’t incredibly painful) then the “connect the phone to a dumb-terminal ‘laptop’ will make perfect sense. As it is? Android by itself isn’t up to it. And the Superbook folks might mean well, but the software to bypass Android’s limits is likewise limited. A (quasi) laptop needs genuine computer applications, not just mere phone apps – though being able to run those (with a standard not-touchscreen pointer) as well would be an advantage. I know Windows claims to do this, but see above. I want, no, need an OS that I don’t need to fight to do plain, simple things.
As for pointers, yes the laptop-oid would have a multi-touch (at least two-point) trackpad. That’s not enough for the OS, however. While some people such as $HOUSEMATE are such mutants that they actually prefer trackpads, that’s unusual. I’d plug in a trackball (I carry one for the laptop/tablet when traveling) and others would use a mouse, at least at home. A stylus is single-point as well and has the advantage of not streaking up the display.
The Librem 5 looks promising, but I’m not sure about it yet. The PinePhone looks likewise interesting, but I suspect at its low price piont it will be rather underpowered for general computer use. I’d love to be proven wrong and be able to have an inexpensive phone/computer, but I am NOT holding my breath on that one. I suspect we are STILL in the Early Days of smart phones, really. It’s like having a home computer in the early 1980’s or an automobile in the 1920’s. You know the general form, but a lot of real standardization hasn’t settled out yet. As things are, I fully expect my next phone, and I do not anticipate replacing my current model very soon, will be another Android device. The one after that? Gentlefolk, place your bets.