Comment by karaterobot

Whether it's your fingers or an on-screen pointer, it's the same paradigm in the sense of it being the same model of interaction. You move a pointer around and activate controls on the screen by touching them. I'm not knocking gestural controls, just saying if I had to classify them, I'd say they're an evolution of the mouse or touchpad rather than a whole new model.

And they aren't an evolution in all aspects, either. Multi-touch controls are easier for some things, harder for others. Fine-grain manipulation, for example selecting cells on a spreadsheet, or playing an FPS video game, are harder with touch controls than with a device like a mouse. They've also got a size constraint (the size of your fingertip) that makes many interfaces harder to use.