And it was right to be said about 1080p. It took nearly a decade for that to become the household standard.
Same is true for 8K. We're getting ahead of ourselves, here. Almost every TV on the shelf at places like Wal-Mart or Best Buy is 4K, these days, even the budget offerings, and yet just
32% of American households had a 4K TV as of the midpoint last year. Meanwhile, only
half of those TVs were actually utilizing 4K. The rest were glorified, upscaled 1080p displays. Do the math. That means right now 4K is only utilized--
just some of the time-- in about 16% of homes. I bet even most of the media and TV watched in the households that did utilize 4K at times is still 1080p native.
Meanwhile, what he says is true about diminishing returns. First, the jump from 480p to 1080p was a more significant raw jump than it is from 1080p to 4K (~5x the pixels vs. 4x the pixels). More importantly, across that jump, the perceived difference in the increased resolution is even less. This truth is compounded jumping from 4K to 8K.
We'll get there, eventually, if they don't decide to just skip over 8K to a higher resolution, or different way of rendering that puts more emphasis on stuff like sub-pixels, but it's going to be about a decade.