If the iPhone loses its dominance in smart phones, this move will have done nothing but antagonize the most obvious heir to the throne. Like nearly everything else Apple does, iAds will have a monopoly on a small market. Meanwhile, much of the iPhone's greatness depends on Google's own products....
Maps is actually a bigger deal to me --- but maps is also easier to replace.
However I found maps.bing.com to be quite enjoyable and in some aspects superior to maps.google.com -- e.g. bing's "birds eye view".
Let's take the whole mobile phone market as measurement. The iphone is still only used by the vast minority, yet it feels like apple users are caught by all that marketing and buzz around apple they reject reality.
Yes, of course, the iPhone has the appstore, it's good hardware and software and shiny and usable and so on. But the reality is STILL that it's a minority.
The reality is that the big old mobile companies have still enough money, resources and potential customers to get. It's just not that Nokia is making all the fuzz around this as the press does about apple. Steve Jobs farts, press coverage instantly. It's sick.