I believe it contains improved Game Finder App and also improved Voice features on the 54.0 remote.
In addition on the voice remote you can now say things such as Play, Resume, Skip Forward, Stop ,Pause, etc... as well as launch apps like Netflix, Youtube, Gamefinder, Pandora and the Weather Channel. You can also say Play and the name of a show and it will play it from your DVR or live TV.
Now have U522 on both my Hopper 3s. Downloaded it thru the Upgrade Software tool. Will check the 40.0 remote control color buttons for any changes later today.
i do not have it yet guys i am wondering if there is a fix to the live stations on iheart radio they are real slow.on the dish music app and dts play fi was going to send dish a codec sample file to fix the stream just wondering you guys