But just watching it causes severe physical pain in me. Everything is awkward, and painful slow. In the time you would have written a page of code on a desktop in an IDE you hardly manage to write a few lines of working code on a phone. Alone the fact that you can't use keyboard shortcuts efficiently is more than crippling! Not to mention the extremely tiny screen on a phone. On a desktop you have for serous work 2, or better 3 screens (or some big wide one), for a reason.

And regarding deep thinking: The best setting for that is imho not the desktop, nor the bed. Best for thinking is actually walking around, while not being distracted by anything else.