The Droid is going as well as it needs to do for Verizon. And that's fine enough.
That said, people need to stop acting as if the success of one means the demise of the other. The Droid is going to be around for a while. But the iPhone isn't going away anytime soon either.
The question is the long-term prospects for the device. Apple has already proven they have staying power and can refresh their products and continue to innovate on them enough to sell more and more. Motorola, on the other hand, has a long history of stagnating. If they could find a way to make it profitable, they'd still be pumping out RAZR V3's if they could, and not care at all about improving on it. They love coming out with a product, seeing that it sells well, and then just beating it to death.
Hopefully the fact that it's an Android-based phone will help the situation. But, I still have doubts.
On the other hand, of Motorola does stagnate, the Android platform might mean it won't matter to end users. They can just migrate to some other, newer Android mobile. Motorola would be the only party to suffer much.