>There seems to be some discontinuity between the Macbook and iPhone lines.

I wouldn't say that, the use case is different. I think wireless makes significantly more sense on mobile.

Laptops are "mobile" but in a different way. they are not meant to be used while on the subway or working out, you sit down pull out your laptop, and if you want to listen to music you can plug in headphones. having to walk away from the laptop while listening to music isn't as important