Timex already made the first step:
This watch is uniquely designed in such a manner that it can mould as one of your nails.
Yes that’s right! Forget wearing watches on your wrist from now on as this watch snugly fits on your nail. Don’t mistake this watch to be a mere nail art as it not only displays the time but also lights up in the dark, making it easy to read time in the night. Press the end of your thumbnail, and the watch will light up for you. Timex in collaboration with Core77 brings in this out of the box design idea.
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http://www.techshout.com/gadgets/200...of-the-future/
Nails, Skin, what will be the next?