It used to be an useless time to commute by car to home (and I used to take the train) and the weather thing. Until I went on vacation to Germany and it started popping places to see, German translating widgets and other goodness. Not that useful still, but I believe it can grow into something really useful and quick.
As it's been said before, that works just on some locations. For the vast majority of the world (like in, geographically), Google Now is not that accurate or useful.
