MTV was way ahead of the trend when it comes to completely changing their programming to be something entirely different from their name and original content.
Just look at all the other networks that did the same:
VH1 (movies more than music)
A&E (currently showing "Live PD")
Headline News (remember when they actually showed news?)
The Learning Channel (now reality shows for brides and wives)
History Channel (aliens!)
Discovery Channel (well, there's still shark week)
Weather Channel (reruns of how planes crash)
CNN, Fox News, MSNBC (mostly political propaganda instead of actual news)