> Traffic is another good example. You want to know that there's a 30 minute delay on your route to work, but it's more important to know where so you can plan your route around it.

Back when I used Android, Google Now seemed to really do this right (if creepily): it figured out when/where you commuted and would give you a heads-up before you left, offering to plan a route around the trouble. More useful since you take your phone with you. Also you didn't have to ask.