Controlled by a Wall?

I understand smart appliances, but a smart wall?  What exactly would it do?  

Called "Wall++," researchers found that they could use conductive paint and a custom sensor board to create electrodes turning a standard wall into a gesture-sensing touch pad and an “electromagnetic sensor to detect and track electrical devices and appliances.”  

But - what about fingerprints? Watch this:  https://youtu.be/175LB2OiMHs 


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