With the power of today's high-end phones why do they all not operate as Samsung Dex does or slot into tablets like the Asus Padphone?
Today's high-end smartphones cost as much as a desktop computer, many have 6GB or more RAM, USB ports, high res displays, cameras, microphones, speakers, ability to link external drives, keyboards, mice, games controllers, etc and they run MS Office, Skype, browsers, and similar apps.
So why don't we see a default ability for them to slot into docks and be operated like desktop computers with a full-size monitor, keyboard and mouse, or like the Asus Padphone just slot into a tablet display and become a tablet. By now I'd expect to be carrying just the one device that I use at home, work, and on the road....
But no, the only revolution was ditching the phone keyboard for a touchscreen keyboard, and that is many years back already.
Overall it would probably work out cheaper so it is likely not a cost issue. It may be that a more universal standard is needed (like maybe USB-C video, keyboard, mouse, storage usability)? Certainly, most Android phones already handle most USB peripherals. To slot into a tablet of course there would have to be a small flap that could accommodate various size phones. It could be that the evolution of Chrome OS into Google Fuchsia is an OS prearing for this?