The interesting thing here isn't a clock, it's the novel power harvesting device. There simply happens to be a clock tied to the output end of the shaft.
You could get some random highly-accurate clock and put that on instead, or you could put a wheel with an arrow on it, and it would be no more or less interesting.
No, long term accuracy is not the sole purpose of a clock.
People make trade-offs depending on application. Eg if your clock loses a minute on average once a week, that's still good enough for most household applications.
Similarly, wristwatches put a premium on low weight and small size, not necessarily on accuracy. (And that's not even mentioning clocks as status symbols.)
Wasn't meaning specifically long term, to be fair I get your meaning but you'll be needing to know the accuracy/inaccuracy for it to be useful beyond a status symbol.
Oh, definitely. And I would have like the article to include that information. Even if it was just to say that it's accuracy is nothing to write home about either way.
