The doctor thing is absolutely correct. Remember I said to ignore everything but the screen at first? Well, we're back to that.
Redesigning the OS to be multitouch absolutely cannot happen unless the hardware shapes are changed, as well. Otherwise we would have problems like that.
I always say this about the HP touchscreen computers: "I think the general argument against this is: tired arms."
That's also why I wrote "desktop" with quotation marks. Desktop computers that use OS XI wouldn't look anything like what we're used to seeing in a computer, but that's to be expected. We're used to seeing: screen, keyboard, mouse, towery part or something behind the screen.
But reaching out to touch the screen becomes severely problematic.
It's vertical. That's tiring.
Since we're supplanting the keyboard and mouse as input devices, we're freeing up the desk portion of our desktop. What to put there, I wonder...
The screen. Or, probably, in the case of Apple, the entire computer.
Think wedge, or even think flat surfacewhichever is more ergonomic for you. A slightly angled screen (15 degrees?) allows for wrist comfort in the manipulation of the GUI. Instead of a static keyboard, we now have the entire computer screen at our fingertips...
Yes, the glass is covering the screen of current computers, but isn't it also just "covering" the screen in the iPhone/iPod touch? The glass in question provides the durability that soft touchscreens (like the really, REALLY old one on my LC 575) don't have. Would you rather Apple have gone with a soft touchscreen on the iPhone?
And to the mouse being such a perfect tool; yes, the mouse is great. An entire generation (myself included; no, I'm not lying about being 19) grew up in the world of the mouse.
It will be difficult to change at first, but...
Remember the Macintosh 128k. Look back at the response there; people comparing the perfect tool that was keyboard input on the Apple II and saying the mouse was a gimmick.
"About the only thing you can't do... is ignore them. Because they change things."
I don't have a 100% complete, point-for-point plan as to how Apple will transition us away from the mouse and keyboard. If I did, I would post it... wait... If I did, I'd be under Apple's NDA and wouldn't post it, but that's beside the point...
The point is: I don't know HOW they will do it, but they're going to do it. It will be radical at first, but the mouse was tossed aside as a children's toy at first, too.
You should write science fiction.