This article is far from complete. Why no love for DoubleTwist? WinAMP? There are several media players that sync to your phone iTunes style, and the article didn't mention any of them - just cloud services that suck bandwidth while you're on the go.
DoubleTwist is an attempt to build essentialy "iTunes for Android" (Except that it works on a lot more than Android),
WinAMP was one of the first PC media players out there; it hit the market back in the late 90's when MP3's were still mostly an underground thing. Other than Windows Media Player, it may be the oldest media player still in active development. The latest versions can sync music to Android devices over WiFi, as well as play music both on your Android device and on the computer.
There are also programs like SyncToy which simply synchronize folders in two different places.
I can't imagine any conversation about replacing iTunes not covering at least that much... and that's just a small portion of what's out there.