The more interesting challenge is how to make wearing the glasses socially acceptable.
I'd feel uncomfortable if a friend brought these on a night out, but then again I think I'd be a minority here in the UK.
Don't take them to France though.
If you understand how a trend starts, this is a perfectly logical place to attempt broader acceptance of what is, aesthetically-speaking, a bizarre fashion accessory.
There are distinct sociological strata that fashion trends progress through on their way to the mainstream and they never start at "nerdy conferences".
Maybe by having them at fashions shows, they become fashionable? There is some kind of self fulling prophecy here....
Seems like a pretty big deal to me.
(I know it came post-iPod, but I loved my Creative NOMAD Zen Xtra. 60 GB drive and it would play all day on a charge, no trouble (wish my Android phone could pull that off))
Specs like being able to play FLAC, and minor differences in capacity per dollar, and often higher quality DACs did not matter as much as the design that made it easier to use.
It is also worth remembering that competing devices addressed the problem of a large library with search, while the iPod instead used an active matrix LCD combined with a large scroll wheel to quickly navigate the hierarchy of artists <- albums <- tracks.
I had a Creative Nomad before the first generation iPod, and even though the Nomad had larger capacity, it immediately seemed like junk in comparison.
We get stats from phone companies that complain about how much more iPhone users use their data plans, and I suspect that if had similar data for iPod we would find that users simply used their devices to listen to music more than users of competing devices.
Stylish ads may have been a large part of publicizing them, but it was the complete change in interface design that made people actually use them regardless of whether they enjoy gadgets for their own sake.