Today I got a software update for my Lumia 820 which adds extra "Livesight" functionality to the maps. I already think that Nokia Maps is pretty excellent because of the accuracy, but Livesight is quite novel (if a little gimmicky) - it basically lets you use your camera to look around you, and overlays places of interest and other markers on the screen in a kind of augmented-reality stylee:

It's gimmicky, sure, but seeing icons and things swivel around as you move the camera makes me feel like I'm living in the future. Or something.