EcoPad Concept Tablet Design Generates Electricity From Touch
Tablet users might be neglecting a potentially huge power source that can generate electricity for tablet computers: human touch. A concept design plans to address this by using power-generating layers on the touch-sensitive tablet screens.

The EcoPad is a design concept from Yanko Design that incorporates the use of human touch as a source of power. According to the designers, the EcoPad no longer needs an external power source to charge the batteries. The device will involve nano piezo electricity film that can convert human touch into usable energy. This way, your fingers charge the tablet every time you use it.
Of course, being a concept design, we won’t see the technology in tablets anytime soon, although we do hope that tablet manufacturers take heed. Being able to charge your tablet when you use it (as opposed to draining the battery during use) is one way to save on electricity bills and reduce your carbon footprint. An additional benefit is that you don’t have to worry about running out of charge during extended use away from your home or office desk.
Credit: Source.iPhone 5/6 LM Concept Rendered by Designer, Certain Specs & Features Suggested by New Design
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Energy = force * distance
In order to get Significant harvesting,
there has to a significant travel distance,
something on the order of a regular key board, ~5mm.
I dont see it recovering any where near
the power needed to run the tablet.
Vaporware!