johngalt didn't mention a mouse, you did. I think when we get larger touchscreens the mouse may indeed become obsolete. (I'm looking forward to it; I never had any love for that form of input.) But a keyboard will continue to be useful for anyone who has to write more than 2 paragraphs in a sitting. That's most office workers. Also, a reporter, marketer, investor or designer (to name a few example non-code jobs) can hardly do their work on a 3 to 4 inch screen.
Voice recognition and predictive text have progressed very well. Despite the challenges posed by group settings, there are plenty of people who would turn to dictation if it freed them from the tyranny of the keyboard ("You want me to type 2 paragraphs? By hand?").
moving from mouse to touchscreen will also require moving from vertical to plane-of-the-desk displays. it's simply not ergonomic to keep touching a screen oriented the way desktop and laptop monitors are today.
Good point. Because of the bad ergonomics I hedged my bet and only said the mouse "may" become obsolete, but it didn't occur to me that full-size displays could sit flat (or very shallowly inclined?) on a desk.
