Yes, patent applications are just ideas that may never get implemented, but the concept is pretty cool:
Meanwhile, a second filing for a “Communicating Stylus,” describes a stylus that includes a position sensing device such as an accelerometer, a tip for writing, a wireless transmitter for sending position data, and a receiver. Apple engineer Aleksandar Pance, who is credited with the invention, said the combination of those components can allow the stylus to enter data into an iPad or iPhone without actually touching the device nor requiring any specialized paper.
So, you could be sitting at your desk, have a thought, and then write it directly on the desk. The writing is seamlessly transmitted to your device.