My initial thought is why query 1TB of data in a browser, maybe I'm the wrong target audience for this but it seems that it's pushing that everything has to be in a browser rather than using appropriate tools
But the article is a little light on technical details. In some cases it might make sense to bring the entire file client-side.
But, if you'd like to instead read the article, you'll see that they qualify the reasoning in the first section of the article, titled, "Rethinking the Old Trade-Off: Cost, Complexity, and Access".
(Does not seem like a realistic scenario to me for many uses, for RAM among other resource reasons.)