Earlier quoted context omitted.
"And then for a lot of the other complaints (e.g. hidden interface, icons that you don't think you can click) it is just a matter of time before people learn it. Then it will become a non-issue." That's not how usability works.
Is pinch to zoom obvious? Is left clicking obvious? Is ctrl alt delete obvious? Is spacebar to pause/resume video/music obvious? I'm no UEX expert but all of the above seem to be things that many people know how to do, yet would not seem immediately obvious at first. I am quite confident that "swiping in from the right to reveal charms/commands/options" will join the ranks of the above. It'll just take a few months o…
Then let me enlighten you. Your ctrl-alt-delete example is poor due to the fact and this is backed up by a Bill Gates interview that that command was meant for debugging and was not supposed to ship in the final product. People started using it and they had to leave it in.
Some music players do not use space for pause/resume.
As for clicking and zooming, these things are so intuitive that children can learn on their own how to do these simple tasks. OLPC and other organizations air drop laptops into Africa and people who have never a seen a computer get them and teach themselves how to use it and how to read.