I think it's not a website you make to get hired to make business websites like this to display information (unless maybe it's a gaming company), but if you want someone to make a game on the web then this is a perfect portfolio site.
I agree, I was comparing it to the title of the hacker news post which initially said "Most impressive 3D website ever" or something like that. That enticed me to believe someone had figured out a really innovative way to make a website work in 3D.
As a portfolio to demonstrate your three.js skills for web game making it's really good.
But my point is that, it's not bringing in a new paradigm of UX that you'd want to immitate.
Though maybe it could if others started making "video games but it's just navigating through a website as you play".