This is just brilliant. I don't know how many times I've been at a friend or family's house and asking for the WiFi password involves finding the router and typing in a ridiculously long and incoherent password. Seriously can't wait for iOS 11...September is too far away.
With a single button tap, you can send the WiFi password over-the-air to the phone. After a short delay, the iPhone password field will be populated on the iPhone and it will be instantly connected to the network.