It's clear that very small market share is not sustainable, but the market is so large that I think iOS will be fine even if it levels off at ~30% share.
that is totally false; I (comscore, nielsen) observe that android came from 1% to near 50% of all sales globally in 2 years despite the media buzz around ip. most of my friends are disappointed by over promised, not met expectations of ip5 and they are moving to large screen android phones. sgs2 and sgn are clear winners as well as htc.