Multi-Touch on a PC: Love It , Hate It, or Clueless About It
 

Where touch works best is when you are manipulating objects or navigating through items. As we have seen with the iPhone, making pictures larger, scanning through them, and even navigating the web is actually kind of fun, and honestly more intuitive with Touch. If we weren't already used to using a mouse and the fact that touch-screens have traditionally been too expensive and suffered in terms of brightness and resolution, historically we'd likely all have touch-screens today.

honestly when i see people stretching pictures to make them bigger with a multitouch i just cringe. i mean really a scroll wheel seems alot easier to me. i really think their practical applications are limited, and by that i mean applications where they are preferable. maybe for car-pc or something