It is still all effectively one "key" to the computer. There is no reliable way to tell one finger/thumb apart from another by a touch screen.Originally Posted by Gorb
@Mirage Knight: Why in the world is waving your hand to turn a page an improvement? As it is all you have to do is click once, scroll a mouse wheel, or hit "page down." All of those are far FAR easier (and less distracting to the people around you) than waving your arm around in the air.
@Paladin: A touch screen has ZERO advantages for a desktop OS over a mouse. There is NOTHING a touch screen can do that a mouse can't do easier.
Also touch screens are far more expensive to replace than a mouse. People will be paying more, getting less functionality, and drastically raising the replacement cost for when their device stops working.
Imagine this trying to be used in an office by the common person. Monitors will be knocked off of desks left and right. Imagine what will happen when a program doesn't respond to someone touching the screen and they get frustrated. As it stands people often bang on their keyboards, click widely with their mouse, and so on. Such a thing currently only endangers a $10 piece of equipment. With a touch screen you are risking a $100-$200 piece of equipment if the touch screen didn't increase the price of the monitor.
Even if the users don't do anything wrong stuff still wears out. As it stands mice and keyboards take up very little room, are light, cheap, and are easy to swap out on the fly. A mouse or keyboard doesn't work? No problem you can store 20+ mice or 10+ keyboards in the same space you need to store a single monitor. There is also no power cables needed to hook them up and nobody needs to mess with the back end of the computer (or the computer at all if you have a USB hub.)
Touchscreens for desktops are MASSIVELY inefficient and provide less functionality than a keyboard and mouse. The only place touchscreens are useful at all is kiosks and handheld devices (tablets, phones, and so on.)