Imagine executive tapping their phone down on reader, and it pops up everything they were doing, and they get to keep using their phone.

The first flaw in the idea is that computing is cheap. You can make a computer the size of a phone for people to carry around, that has been tried but failed. The second flaw is that everything is in the cloud, only developers and offline need local access to their files. The cloud also means that can desktop in the cloud.