Look at Microsoft's direction for Windows Phone 7, for instance, and tell me it's going to be any sort of alternative.
And as for Android... eventually, someone is going to release some kind of really hideous malware that does substantial harm to a large portion of their user base. Jobs will spin this event as inevitable -- just as he has already tried to do by casting Android as the "porn" platform of choice -- and Google will end up marginalized further in the public view because they made the silly mistake of leaving their garden gate unlocked.
The harm done by Apple's policies can, and has, rippled out across the entire mobile computing sector. It is dangerously naive and disingenuous to claim that you can dodge this damage by "choosing not to buy an iPhone."