Let’s face it, when companies are interviewed at tech conferences, they talk about all kinds of crazy stuff that will never be launched, like the idea of wearing a digital tattoo to unlock your phone. Except this time, more than a year after first discussing the idea at the D11 conference last May, Motorola has actually done it and is showing it off in a new video. VivaLnk is selling packs of Digital Tattoos for a dollar each. Currently available for the Moto X, with support for other phones promised, each tattoo is said to last for around five days before washing off.