PS, voting me down won't make the article any more on-topic, and it doesn't matter anyway, I have oodles of this karma shit, and if I have to burn it pointing out the reddit-bait, so be it.
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.
I think this would fit under intellectual curiosity, but who's to judge.