This is what your touch screen has been missing all along.
Sometimes technology is born incomplete. The motion picture was popular for 20 years before it had sound. Modern computers were popular for 23 years before they had graphical user interfaces. Today, you wouldn't think of using these partial technologies, and tomorrow you won't think of using a touchscreen without a haptic display.
The TPad Phone marks the beginning of a revolution in human interfaces. We will no longer be stuck on the other side of the aquarium glass, able to see digital world, but never able to reach it. The TPad Phone is your magic portal to the other side. You'll know it's real, because you can feel it.
Some people need to be convinced. Do my icons really need a texture? Do my keyboard keys really need a shape? I can see what I'm doing, why do I need to feel it? These are the functionalists, the people who would strip the world of it's "unnecessary" parts. Why buy art when the wall is already painted? Why see live music when it's free online? Why light a candle when fluorescent lighting can flood the room?
Tactile displays aren't for functionalists. They are for living, feeling human beings. It's a sensory experience. Instead of feeling that sticky, greasy feeling, you feel the richness of materials, the contours of objects, and the crisp feedback of your actions. Everything you've ever touched has a texture, except for the icons on your smartphone screen. We're bringing the richness of the real world back to your fingertips, and it just feels good.
The TPad is a variable-friction tactile display. It changes friction, or resistance force, as you slide your finger across the screen. When it's on, your finger feels light and is easy to move. Beneath your finger, the surface is moving up and down less than the width of a strand of spider silk at frequencies faster than humans can hear. Your skin bounces against the surface, and is supported by a film of air like an air hockey table. It's literally floating on air.