But that was more expensive to build and required some sort of device that would project an interface onto the skin, while this tattoo can simply be applied like a regular temporary tattoo: stick it on your skin, apply a damp cloth, peel off the tattoo paper, and eventually, remove. If anything, this is more akin to some of the "smart" patches that health and consumer product goods companies have been experimenting with. If the future of wearables is this easy — and easy on the eyes — then sign me up.