I took the point to be that you can view the screen as you view a print. Personally I’ve never found it to quite work to change viewing distance to mathematically fake the experience. I’d be curious to hear from people who’ve tried such a pixelpitch matching setup and hear what they think. Would be valuable if it works.
Of course his “correct viewing distance”, “proprietary sharpening method” and the rest is just salesmanship for paid content. Something I have very little tolerance for. The way he speaks makes me think he might be neuroatypical so I don’t mind it as much in this instance.