Under Pressure

Having a stylus (as a peripheral, or as part of the MacProTouch), is a good idea initially. You open a world to the user of drawing, writing, and possibly painting directly onto your computer.
Except for one small problem: pressure. Pressure is vital to all these forms of communication, because it allows for a subtly and various in pen/brush strokes that can not be replicated by a plastic supposed to be a pen.

Some styluses (?, stylusii?) use proximity to the surface to indicate pressure, but this has an unnatural feeling to the process and the user has to relearn the technique.
Nothing beats the pressure you feel as you place a pen against paper, how the paper responds to your every stroke. So the question is: should a touchscreen try and replicate this behavior?

I think it absolutely should. This for me is the key 'game-changer' of touch screens. The ability to draw/write naturally and then EDIT those sketches, is something that has never been done before.

Imagine Van Gogh painting sunflowers on the touchscreen the way he would on a canvas, furiously, naturally, the truest connection between man and canvas. Now imagine he can change each individual stroke, reuse it, animate it, delete it even. It opens up a new level of artistic expression and artistic perfection never before seen in the real world or virtual world of computing.
Imagine taking a sketch of a concept car and converting those lines to a 3d dimensional rendering which you can 'mould' in Autodesk. Gestural working a mould of clay on a 2d touchscreen connects the brain to the z axis in a new and exciting way, and ups the stakes for everyone. Now Photoshop and Autocad have entirely new software paradigms to construct.

A simple concept of pressure, can fundamentally change the software industry.

I should be able to take an actual paintbrush and use it on the MacProTouch. For every hair in the brush to be recorded, the pressure I use in the stroke, the speed. Then MacProTouch goes from entertainment system to a truly mindboggling system.