3D movies, I remember everyone being so excited for shit like Avatar because it was a 3D movie without the dumb red and blue lenses. Then it turned out to just give you vertigo.
Or even 4K TV. Like it looks marginally better if your face is jammed into the screen, but all it really does is suck up way more bandwidth and cost $400 more.
It was, but they also released it a sort of standalone demo before the game came out. So when you got the actual game you were expecting so much more.