What will be the next watch technological invention?

Let's guess in big. What do you think will be next wrist watch invention. Do you believe it is time that some new technology comes? Tattoed Cartier? Digital micro-chips on our wrists (saw it in the movie In Time)? Or anything else?

My crazy invention: oxygen perpetual watch (contras: no space watch and difficult for divers) ;o) 

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I'm happy with the way things are. I guess I'm a traditionalist. A mainspring,hairspring pallet forks,rotors, escapements,keyless works,gears and jewels and screws are technology enough to make my head spin.

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Compliant mechanisms like the Zenith Defy or the FC in this article:

https://monochrome-watches.com/the-science-behind-the-innovative-frederique-constant-monolithic-oscillator/

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Long battery life on smart watches.

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That is not an invention for me. Just an improvement ...