His blog post shows him map out various interactions, and their resulting spaces:
I don’t necessarily agree with all of his points (he believes that web apps are primarily linear), and also agree with one commenter pointing out that he didn’t have to use a webapp as the concepts of flows in architecture have been around for decades. Still, it’s an interesting concept that puts the A back into IA.
I also noticed one of his points in his rationale.
the web is not a graphic design medium but a product design one.
The correlation between web and product seems to be becoming noticed as of late (for example Jeff Croft’s ‘In 2012, Let’s Stop Talking Web Design and Start Talking Product Design’ or Smashing Magazine’s ‘What Successful Products Teach Us About Product Design’).
Above all, it’s a reminder at how we can not only draw inspiration from other disciplines, but also feed it back the other way.