why is this on HN?
Curiosity leads to wanting to figure out why things are as they are and how they can be improved. Never know when something seemingly independent can lead to some other inspiration.
However, I do agree the content is lacking and it says that the actual research behind it is on an open site (though no link). Would have been nice to link that instead of the above link.
Since it wasn't posted here's the direct link to the research: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjourna...
On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.