You do understand that it wasn't the iPhone that killed Windows Mobile, Palm, Symbian and (maybe) Blackberry, right? It certainly didn't help, but to this day

You do understand that it wasn't the iPhone that killed Windows Mobile, Palm, Symbian and (maybe) Blackberry, right? It certainly didn't help, but to this day (and probably for the foreseeable future), there is still a larger non-iPhone slice of the market to divide up. Existing smartphone players could have stuck with incremental improvements and held onto more than enough to survive. As evidence, I'll note that iPhone didn't pass Symbian until somewhere between Q2 and Q4 2011 (depending on which analyst you believe) - after Nokia announced the switch to Windows Phone. Existing players could have survived the iPhone, but something else happened...