It is an interesting approach.

I use 9x9 images everyday at work.

The quoted 4,000 dpi film is probably pan-x. It is still available from
Kodak as aerial roll film.

Their color emulsions don't have that much resolution, so it is probably
hyperbole.

The scanner that they quoted using is an excellent photogrammetric device. However, it doesnt handle the density range of negatives as well as drum/graphic arts scanners do.

The correlation to a good 8x10 neg is on point, except that this is a 9x18 image that he is using. For strong horizontal compositions it is pretty nice.

Interesting shtick - but unfortunately it is notoriety based on a unique bit of hardware rather than talent/taste.