I’m not totally buying that, but I really like the idea.
Not quite sure how they pull-off wireless charging for the masses.
However you could be spot-on.

Why? 

Why do you need a new adaptor for old dock connectors as reported? Won’t the new phone come with a charger?

Why is the connector smaller in the 1st place? Why bother with so much more room in the new shell?

Everything is Wireless now except charging, right? The adaptor won’t fit in existing dock-style accessories, so what’s the point of an adaptor? Save your old car charger? Really? How can Apple predict they’ll sell so many adaptors, as reported, which so few really should need? Why buy an adaptor unless you plan to use an old charger in addition to the charger that comes with the new Device? Only if you want two or more chargers, right?

Two seemingly unrelated questions: why is the phone so much larger than the extra screen size requires? Why did Nokia botch their announcement going early before they had a release date?

Guess what, all these questions are answered by one simple feature:

The iPhone 5 will be a 100% wireless Device with wireless charging.

The smaller dock is for service and recovery access; no cable included in box.