I go back to the point I made in my first post. For the NORMAL Mac user (home user, programmer, photographer, blogger, whatever) a touch screen mac is IDIOTIC.
Its a gymic, and nothing more. Lets look at a few, every day examples.
You've got your nice shiney 27" iMac sitting in front of you. No mouse, no keyboard. Lets open up safari from our dock. Reach approx 20 inches in front of you to your screen and tap your safari icon.
(browser opens up)
Ok, now lets go to something like facebook. So hit the address bar, an on screen keyboard of sorts pops up. Now, you're going to have to ben your hands backwards so you can still see what you're typing, but obviously because this is an awesome magical screen, that must be good for you.
See the problem? You need a keyboard/mouse. Once you've got them - it renders the touchscreen pointless.
Lets take another example. Try playing something like The Sims, or a car racing game. You cant exactly pick up a 27" iMac and start waving it about to control your game now can you.
Another example. Word processing. You've got an essay to type up. You need a keyboard and mouse - again, rendering the touchscreen pointless.
Final example: You want to watch a movie. You hit play, go in to full screen...ewww greasy finger prints...but you made sure you washed your hands every half hour...how'd that happen: NATURAL OILS IN YOUR SKIN!
Here's a question for you: What possible improvement do you think this will bring? I mean seriously, how the hell can you think a touchscreen computer is anything more than 'cool'? It's pointless, and designed to pull in all the idiots who will be fooled by another speech from Lord Steve.
So, to sum up: Its a gymic, a stupid idea, and basically stupid. You can just overcome the ergonomics or cleanliness issues.[/SIZE]
You need to read the first 6 pages of this thread
And if you bothered to take the 2mins that it takes to read the link to Apple's patent, you'd see that the touch screen isn't meant as a replacement for the keyboard and mouse, it's meant as an additional form of input. That fact alone renders all of your examples useless, since you still have the mouse and keyboard. And yes, there are touch based games that don't use "screen tilting" in order to play...