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.
There was a Half Life 2 mod called The Hidden or something like that years ago. Everyone on one team as submachine-gun toting mercenaries against The Hidden, an invisible player with a knife that had super human jumping. Whoever killed The Hidden became the next Hidden. It was an absolute blast. Lots of great scares to be had. It says something that a team of amateurs on the internet can create an Everyone Vs The Monster game for free and when Capitalism tries the same it fucks it all up.
We did the same thing in Halo 3 custom games by making the Juggernaut or Oddball traits super speed and invisibility. Fun times