it never required hardware it was the same exact implementation. you hold up your phone in a magic window
Not to mention execution: my experience with Layar is that it was pretty shit for the most part. Wordlens was cool, but it's not like I can just build an app that uses Wordlens' tech, and even if I could, it would be, well, Word Lens. Not AR in the broader sense.
Everything I've seen from ARKit seems much more solid and much more practically useful than the 'floaty overlay that roughly stays in place' glorified tech demos I mostly see.