Upvoted. But...
There's so many reasons why it's hard to say this is really unwanted. Atrix was a boutique not mainstream product so who knows what would have happened had it been generally usable.
At the time we didn't have anything like usb-c, so it was all special peripherals and displays. Now though a decent % of displays do have USB-c with power, and that's totally different starting conditions. Especially if that display also has a keyboard and mouse plugged in, which many do!
Commercial success requires paving of cow paths, needs a low impedance route to mass success. We haven't been in a spot where that's ever been remotely possible before.
Do I think Android on display is going to totally take over & dominate soon? No, no I don't. But mass availability and a world capable of supporting - making use of this capability has just arrived, and this really lets us get started with these ubiquitous & pervasive computing ideas that, so far/until now, have had to be bespoke offering.
Different but also similar, it feels like game streaming has some reasonable popularity too now, and it's another case of using interconnect across devices & peripherals that I think a lot of people have really grown into & deeply enjoy being able to do. It's still a small segment of people, relatively, but to me it speaks of adoption curves & how success is often extremely slow, how there are real fans who feel great joy & happiness, without the rest of the world being much tuned in or aware.