Meet the STRATOS Explore: an innovative haptic feedback system that gives you the sensation of touch through the air. The platform ships with a 256-transducer array board and a Leap motion controller for hand tracking. It is ready for C# and C++ development. Its sensation editor lets you experiment with mid-air haptics sensations.
This technology relies on ultrasound to project sensations through the air, allowing you to interact with virtual objects in a more realistic fashion. You can find out more about it here.