This is a wicked cool application from Amnesia Razorfish. With it you can transfer content between your iPhone, iPad, and other devices using a Microsoft Surface table just by sliding things around. It is the most natural way possible for moving around your content. No more "send and receive." No more searching for USB cables. You don't even have to save the files to your DropBox folder. Instead, you just lay down your device and it all magically happens.
This is what good software and good design is all about. The interface is so natural that you forget about it. This is the way more and more applications will be designed.