On a physical keyboard, we can rest our fingers on it without actually pressing anything. On a touchscreen interface however any finger touch will be registered as a key-press. Verdict: Keyboard , touchscreen  (keyboard wins).
Some statistics suggested that people who do lots of typing are more prone to RSI injury as compared to people who use mouse more. I think it’s true because the way of using mouse resembles writing more, and everybody knows writing is more natural than typing (and controlling mouse requires less movements than typing). CLI worshipers, know what you’re defending.
People always told me that as Linux users, we should take advantage of CLI’s power and should not fear of its user-unfriendliness. Well, I could say similar thing to them too, like “you should take advantage of GUI’s user-friendliness and should not fear of its limitations”. Fair enough.
If you think technology can solve your security problems, then you don’t understand the problems and you don’t understand the technology.
Come to think of it, Apple does not contribute to the emergence of computer geeks. Computer geeks exist mainly because people are able to build their own system from scratch and freely customize it, which is a ‘pleasure’ that Mac users would never enjoy (unless Apple acknowledge/approve the ‘Hackintosh’ or legalize Mac-cloning or even allowing Mac OS X on non-Macs, which is very unlikely to happen anytime soon – the possibility is almost zero).
I remember when I was working as a temporary teacher before, the Education Dept. provided teachers with Macs as teaching tools. However many teachers complained, especially veteran teachers who can’t get used to it thus the Education Dept. stopped supplying Macs and provided other PC then. Besides later on the Education Dept. also decided that Macs are expensive and requires special maintenance and consequently dropped it from the list.