I think what you've covered is actually a bit different than what touch screen proponents have in mind.
For serious work, you need a solution like the one you've outlined: an interface focused on long term use, even if it requires training to use.
Many proponents of touch screens highlight the approach-ability of a touch screen. It requires minimal amounts of training, but it's rubbish for long term use or large sizes.
Personally, I very much prefer the "efficiency and comfort over intuitiveness" approach. I am a die, hard keyboard/mouse user, and I edit text in Vim.
I do think that the final win will be neural-computer interfaces, because then both catagories are satisfied: high easy of use and approach-ability, while requiring very little movement.