While it's not a major Android version update, Sprint is rolling out a pretty good upgrade to Evo LTE customers. The over-the-air software will add the ability to stream audio/video to a television set or other display via an MHL cable. Neat!
The update will also bring a variety of improvements, including to WiFi, Bluetooth compatibility, and the proximity sensor while listening to voicemail. So hopefully you won't have to worry about your face pressing buttons now.