I can't understand what exactly is in this dream you want to become true. It sounds like you want a portable device with physical keyboard, and reasonable screen size. Which is laptop.

I think it's about being able to take the portable device with you separately from the display and keyboard.

I assume it's something like mine. I want a phone I can dock and use as a desktop with a monitor and mouse/keyboard. That is just a phone when undocked.

We have reactive UIs and desktop mode on android. It's getting very close. I am not certain on the previous commentors reasons but I detest the many device game. A 500 dollar pixel 10a is a great computer and I would rather not buy another machine if I dont have to.