I'm looking at you, Watch_Dogs! Remember, E3 2012 when we witnessed an amazing looking game. It had physics, weather effects and other goodies that made everyone's jaw dropped and wallet open. Then, we got the game. Everything we saw, all of those goodies seemed to have disappeared and left us having to play online to play a single player game.
This isn't the only game that has done this, but it was one of the biggest and most widely known to see this sort of crap happen.
Publishers, if you ever wanted to know why your customers are losing trust in what you hype up about your games, this is one of the main reasons. It's hard to trust what we see at E3 anymore.