I'm pretty excited for the advanced warning on traffic at home and at the office. Commuting in and out of Manhattan means I always have at least four options, but knowing which is best (before Waze) was the real magic. Waze is ok, but eats the phone battery and has an unhealthy love for the Brucker. The more integrated experience should be at least a nice option, even if I don't use it every day.
The calendar integration seems like a decent bit of functionality, though not sure how much I will use it.
It will be interesting to see the impact of the night sleep and the always on internet connection.