Smartphone Market. What sort of impact remains to be seen, but they just may come on like a fierce storm. It takes one phone to light a fire. Android saw it with the Motorola Droid and Windows may see it with the Nokia Lumia 900.
This is all speculation of course, but consumers are VERY fickle, and what's hot now can quickly fall out of favor tomorrow. I can't say with certainty that Android will continue to snatch up market share and eventually dominate the mobile space.