University of London's Godsmiths College student Florian Kraeutli has one-upped the laser virtual keyboard and designed a working prototype utilizing the iPhone's built-in accelerometer to register/measure the vibrations when striking a paper keyboard...
Florian Krautli explains: "Touch screen devices, such as smartphones, lack a suitable method for text input which can compete with mechanical keyboards. The Vibrative Virtual Keyboard aims to appease the frustration felt by smartphone users when faced with drafting lengthy emails or notes on a small onscreen keyboard.""The keyboard requires no additional hardware as it taps into an iPhone's built-in accelerometer, which is able to measure the vibrations caused by typing on any hard surface."
For now, the Cube Laser Virtual Keyboard for iPad & iPhone is the closest thing on the market to this anywhere, virtual keyboard. But we wouldn't be surprised to see smartphone and tablet makers "tapping" into the technology and ditching physical keyboards altogether.

Commercial Flour Sa...
I don't see this working in a real environment. Because it would require more effort to make sure you type exactly right all the time, plus most people wouldn't be typing on a wooden table when they are typing or texting. Interesting concept, but not feasible as least on the short term.