"WiFi sharingWiFi lets you quickly upload photos and videos directly to social media sites, back them up on a network-connected PC, or view them on a large screen TV. WiFi-enabled smartphones and tablets can also pull images from your camera and upload them to social media."
It doesn't say so in that blurb, but I expect the feature might also allow printing directly to a WiFi-enabled printer, or via Google Cloud Print; I know I can do those from my Android phone.