I like the terminal, and I am also a reasonable touch typist. I don't particularly enjoy typing though. I've tried a few different keyboards. And I _do_ get the power of the CLI. But I think it's a barrier to computer input. And it's a barrier to free conversation. Check Youtube comments for example. I think some of the terseness (think Twitter) results as a result of text entry being laborious. I'm not familiar with using a tablet - and I always feel somewhat restricted and impotent when using mobile devices, which I figure others feel when using a keyboard.
OSs could make text entry far better and centralise it. Portable dictionaries and shortcuts for example. Yeah you can do that by keeping shell scripts on a remote, but it all feels a bit hodge podge.
Jumping from one CLI to another, different apps, etc can feel nasty. And I'm personally not happy putting my primary CLI in a cloud based SILO.