Let's see: Jacks up the price of things for nothing but a gimmic
Wich wouldn't be so bad if it wasn't being passed off as revolutionary technology for the future.
Those 3D TV's are expensive and not worth it
Movies are now all comming out in 3D and some places don't play the 2D version screwing over people
A lot of the time the 3D's tacked on
I've watched 3D movies and though: "that was nice, but not worth it"
Nothing ruins a movie quite like a smudge on your bloody 3D glasses you need to leave the movie to go to the washroom to clean the glasses, so you can come back missing a chunk of the movie
Some people face fatigue, headaches or it plain doesn't work for them
I like 3D on my 3DS, it's nice. No glasses and I choose when it's on or not.
But companies are trying to push 3D as if it were gods gift to mankind.
Especialy Sony.
3D isn't neccessary. But they're tying to make it part of everything. It's like zombies, people wanna shove it into everything, wether it works or not just because it's 'popular', wich only kills the appeal and makes it over saturated.
In the end, 3D's just another way to charge more for something. That's all it is.