Compared to a whole slew of Ultrabooks, and other 13" laptops which were smaller. I'm not sure how you get that Apple's drive for smaller laptops made the iPhone possible (given that it's form factor, LG Pradas, etc., were also quite widely available at the same time) - I don't see the size innovation here that you seem to be.
When the iPhone came out, this was the 13" MB you'd get: https://everymac.com/systems/apple/macbook/specs/macbook-cor...
Compared to a whole slew of Ultrabooks, and other 13" laptops which were smaller. I'm not sure how you get that Apple's drive for smaller laptops made the iPhone possible (given that it's form factor, LG Pradas, etc., were also quite widely available at the same time) - I don't see the size innovation here that you seem to be.