Panoramic Camera option
I was really impressed with the Panorama camera mode (accessed by setting your Shooting mode to Panorama). It enables you to pan while the camera snaps photos to create stitched together panoramic photos.
I know other apps on the market have done this, but the photos I've taken are practically seamless and look awesome.
A word to the Instant Uploaders (G+ Instant Upload): These photos do not get resized to have their max length be 2048, so panoramic photos DO NOT get attributed to your Picasa/Google free unlimited storage.