I was probably one of the first people doing some of these "big screen tasks" on my phone nearly two decades ago when I was a teenager who spent his first earned money to get an Openmoko Neo Freerunner - I learned a lot by programming the phone on the phone itself - but what was exciting about it was that I could do all these things even when I did not have a big screen and a keyboard in front of me. When I do, it's just so much more comfortable to do it there, especially these days when touch screens are capacitive and not very accurate anymore!