It's perfectly possible to touch type on a touch screen. It's just not as easy as on a real keyboard. You are giving up ease of use to obtain portability.
When I first saw touch screen computers used in McDonalds I thought the kids were too stupid to operate a real computer.
You want the kid in a McD to greet the customer with a smile, enter his order effortlessly and accurately, and deliver his meal quickly. You don't want the kid "to operate a real computer". Because, then quality of service would decline, and you'd have to pay the kid too much money.
Icons is a short cut for “Can't Read”
这是众所周知的，图标是更容易阅读。是的，没错！
How about me proving I am a real dinosaur, do they read books? Or is life icons, Apps and a kindle? How are they going to survive when TSHTF? Do they have any life skills? Or are we replacing them with icons and self gratification in angrybird apps? Can they catch a fish, without a battery?
These are an old mans observations on life, silly to the young. Of no “real” relevance. At least until it gets real. Creativity can be done on a tablet. But you can draw and work engineering a lot better with a mouse than a finger. You can write a treatse on anything better with a keyboard with tactile feedback than tap out letters with your thumbs. The tool is the difference between building a building with a hammer vs a rock.
And that, in a long way is why windows 8 is a mistake.