What does that have to do with anything? The iPhone is still a consumer device as well. The enterprise isn't about mobile anything, it's about internal applications and B2B systems integration and .Net and Java rule the roost here, as does SOAP still. What works on the public net and what works in the enterprise are light years apart and probably always will be.
Not at all, and the iPhone kicked the blackberries ass, but that has shit to do with enterprise space. All business != enterprise space. Enterprise != mobile. Mobile created a new space, apples and oranges.
He's referring to the fact that Ballmer dismissed the iPhone when it first came out as an expensive toy that only consumers would care about. As everyone has seen now, "enterprise" phones like Blackberry are dead in the water and workplaces are adapting to supporting iOS and Android devices instead.