Datoos, or DNA tattoos are an idea conceived by Frog Design. The idea is simple, a temporary printable tattoo which has an interactive display which can also monitor your health through various input. Essentially they are an idea for a more artistic way to replace and improve on current smartphones. Sadly frog design hasn’t moved forward with the idea, but there are still a number of articles on the design which are worth a read (Gizmag, bit rebels, technovelgy). The concept however is still a very good one and one which I think will definitely be pushed forward, in one way or another in the future.
The key idea I think behind this technology is the idea of internal health monitoring through devices. With more sophisticated nano-technology/synthetic biology we will be able to create more machines which can exist within the body and interact/control them externally. There is also a lot of potential for interfaces which can draw power from the body itself – saving on costly and bulky batteries.