If you're not on Facebook or Twitter or whatever, it shouldn't matter to you.. but there are millions of iOS users on Facebook and Twitter, and this kind of deep integration matters to a lot of these people.
If its really good.. I'm sure a significant number of people will. I see it as win-win for Apple if Google releases a stand alone maps app for iOS. iOS users will have the best of both worlds. The free turn-by-turn navigation on Google Maps for Android has attracted a lot of people towards buying Android phones.
From a product stand-point? That's not his job. That's what he has Ive, Forstall, Mansfield, and rest of his team for.. He's done a lot innovation in the supply chain and logistics. But overall his job is to run the company in a way that allows his talented people to innovate.
And Apple will dominate the tablet market by even a wider margin by adding a 7" model to the line up.. I don't have an iPad but I would definitely buy one if it's 7". And I'm sure there a lot of people who would want one to.