In a way most of these came true.
> Thin clients
The cloud.
> Palm pilots.
Cell phones.
> Windows, Mac, Linux
Windows is still for business/economy. Linux is still for neckbeards. Although Mac is bigger than it was, the same people are still waiting for Apple silicon to catch on.
> Keyboards and mice
Have largely been supplanted by touch or gesture and consumer VR is becoming more and more viable every day.