Airline sends me an email 24hours beforehand with a link to check-in online. Failing to see how that direct from the airline is inferior to Google Now reminding me to check in online.
Both the airline I usually use (both personally and when booked thru work), and bahn.de send me a .ics when I book too, so that goes in the calendar too.
Don't need any of the Sports (loathe footy anyway), TV, Movies, etc. reminders.
My local transport app tells me where I am, what buses/trams come next (so does turning my head and looking at the electronic display), how to get to the nearest tram stop, and can even scan the QR code on the ticket machines to set start location. Both that and bahn.de app let me buy the ticket in app.
^^all that on Gingerbread.
But Google Now does look interesting, assuming it can seamlessly integrate with Deutsche Bahn, Lufthansa, Swiss, BA etc.