Thanks to Samsung, I have a chance to get close and personal with the Samsung GALAXY S4 recently. One of the features of this phone is the gesture (Air Gesture and Smart Scroll). And I think this is one of the few phones that has Temperature and Humidity sensor built in.
Check out this short demo on the Air Gesture and also a look at the temperature and humidity sensor at work (S Health).
So far, what I seen on the GALAXY S4 is innovation on the software side and also, implementation of sensors (barometer, temperature and humidity sensors) normally not found on smartphones.