Digital tattoo returns: "eSkin" for all NFC phones

Remember when Motorola's Moto X had a digital tattoo you could apply that would unlock your phone? Turns out the company that made/makes said tattoo wasn't finished there. They've just done a sort of silent release of their next skin-applied technology, the eSkin Tattoo. This release is essentially the same as the Moto X-specific "Digital Tattoo", but it's made to …