I don't think the article makes that mistake, there are plenty of non-graphics examples: AI / simulation of thousands or RTS units, motion controls, companion apps.
Two lines out of the entire article mention those. I would not exactly call that "plenty of non-graphics examples". There are many more CPU intensive processes besides just those that result in real technical challenges, as well. My point is that since the article doesn't do them justice, it shouldn't be the phrased as the "tech" arms race, but instead as the "graphics" arms race.