You can now ask for and receive tailored information about sports scores and stats on players. Restaurants will now return detailed information about hours, Yelp reviews and offer the ability to book a table through OpenTable. As for movies, you can now ask about particular actors, in addition to fetching local movie times and Rotten Tomato reviews. Siri can launch apps that you ask it to, which is a nice, simple addition. Finally, Apple is partnering with a bunch of car manufacturers to offer hands-free voice activation, much like Vlingo's current inCar solution.
As you can see above, there are a bunch of new features. There's also a lot of new localization, including language support and broadened local search.
There's lots more coming from WWDC, so keep an eye on our liveblog!