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. Additionally, an issue where certain processes or applications shutdown unexpectedly should be resolved.
The OTA (3.16.651.3) is rolling out to users right now.