[artou]

3D IMHO is only effective if you can get fully immersed into the picture displayed. That means a widescreen where, in your field of view you cannot see the edges and if possible the top of the screen.
This means a home cinema setup with a projector such as the one @hdmkv has

Any TV at home is not going to do 3D justice unless everyone is sitting real close. Otherwise yes it is was a gimmick by TV manufacturers and Kodi media player sellers to sell more expensive hardware.

I still enjoy really good, immersive 3D on massive Cinema screens, like the IMAX setups. Doctor Strange was one interesting movie and used 3D really effectively.

I do agree about 3D being much better in a bigger screen, but with the number of movies in 2016/15 that made good use of 3D, and considering current costs of a 4K/3D projector (or a biiig 4K/3D TV), as a no-4K screen should be a difficult new purchase decision, it is hard to believe that 3D will have a better future than now...

...and I was a 3D addicted

PS. Glad to know Dr. Strange has good 3D