I'd hope there will be the "thin one" with no headphone jack, and the other ones. But I've come full circle. I almost never use headphones with my iphone anymore. I use it in the car via a dock, and everywhere else I use the ipad or the computer.
solar panels seem like they're a long time away from being optimally efficient, and roads get a lot of wear and tear. The concept is good, but I don't think it's ready. Maybe a solar roof over the highways instead.