2 years ago you paid extra for 3D. Last year most any decent HD Flatscreen beyond 46" seemed to just have 3D as a matter of fact, and not a choice. I know many people who bought their TVs because they loved the TV- 3D just happened to be on it. I fall into that camp. I actually really like having the option, and have enjoyed a bunch of 3D films(providing the 3D was done correctly and well). But I didn't buy it because of it. Now we have this weird trend of movies in 3D in the theater, but their respective Blu rays afterwards are only offering it in territories outside the U.S. (Noah, Dredd, etc.).
Just like the old story that porn decided which way the wind would blow on home entertainment format wars, I think it is true that Japan, Korea, and Especially China are going to be leading indicators on all things 3D, HFR, and (god help us) texting participation movie theaters. And the Chinese and Korean markets Love, and I mean, freakin' LOVE 3D. So, I don't see it going away anytime soon. Plus, factor in heavy hitters like James Cameron, Martin Scorsese, Peter Jackson, & FX legend Douglas Trumbull who all love this move to 3D.
So are the TV's themselves selling slow? Yeah. But we'll see. Let's also not forget that there is a kinda format war within 3D- Active Vs. Passive. And TV's are in a flux cycle. We have 4k, Curved Screens (which is a scam on SOOO MANY LEVELS), OLED (3 to 5 years away for most consumers- but will be the next gold standard), and 8K off in the near future (which will quickly supplant 4K to the dismay of buyers of 4K TVs everywhere).Like I said- I'm not an advocate for 3D in any way. As long as I can choose between which way I want to watch it's fine.
But since my purchase of a new screen earlier this year, I haven't paid much attention to the market...But back in January, 3D TVs where available everywhere. They weren't pushing them hard like the years before, but they were there.