Re: waste of time
There is a lot to be said about tactile interfaces. I could type without looking at the screen or keyboard on my old Desire Z as I could feel where the keys were. I can touch them without the device thinking I am pressing them. Thus my typing speed was a lot faster than on my Samsung S4 or on my 10" tablet.
An on screen keyboard is ok for a short reply, but if you want to type something longer (or even have a rant online) I always find myself heading to a PC so that I can put my words across at full thinking speed instead of being held back by the bottleneck of typing on a virtual screen.