The Kimoyo Beads are close to something I've been trying to think of for a far-future general purpose portable personal computing device. My thing will be very different, but it's put me on the right path.

Something like what Google tried to do with Project Ara, but it works and is practical.

@checkfox I know what you mean. Wearable tech is a thing I like to experiment with, both in writing and in the real world. An item which is both jewellery and computer is something I find very appealing!