IMO: That's just due to the speed of responses.

Hardware will continue to improve, and eventually you'll have the choice of reaching a flow state with 2026 models, or using frontier models at our current level of performance.

In a sense, that is almost exactly the vision of the future shown in accellerando. User can and does send tons of specialized agents into the world. I am still not certain if I buy the premise of the article, but then my company is too cheap to let me play with Claude.