Thank you for sharing the article, though I've heard this point before -- when the music and film industries first noticed that videogames started allegedly eating into their revenue.

The point is that we're reaching peak attention partly because we've reached peak developed internet and low-income areas would need more leisure time to be (as a result of better income) to be a greater and more valuable part of this economy.

Human attention is not going anywhere as a concept, right now it's a more desperate battle for redistribution of said limited resource.