You still don't get it. 3D sucked, it's always sucked. It sucked back when they tried before, and it still sucked when they launched it again in 2009. The only reason it was supposed to be the next great thing was because that is what Hollywood and TV manufacturers were trying to convince people of so they can sell them over priced TV's. Most people saw it for what it was, a gimmick, and didn't fall for it. I think the fact that you were disappointed by 3d clouds your judgement on just how good VR is and where it can go.
Watching movies being a more social activity means most of us watch movies with a significant other, or your family, with popcorn and shit ya know ? PC Gamers game in single player games or online with friends, wearing a headset won't be a limitation.
VR on the other hand, does not suck. It is light years beyond simple 3d glasses with a TV.
I'm not saying the Rift or Vive is going to be mainstream in the true sense of mainstream. PC Gaming has always been a bit of a niche market. That will be Gear VR or other smartphone adapters. But these VR headsets for PC's and possibly consoles, are here to stay.
the fact that 3D is still going in 2016 shows that consumers don't feel it sucks...look at box office numbers for the same movie in 3D and 2D...of the 4,100 screens playing The Force Awakens, 80% is in 3D...opening night numbers for the movie showed that the preferred choice of opening-night moviegoers was 2D, at 54.2% (which is not an overwhelming number)
* I keep using Force Awakens as a benchmark because it's the #1 movie of all time domestically (and most likely globally soon enough)
of course TV manufacturers and Hollywood wanted 3D to succeed but after the 1st/2nd gen TV's the prices were not any more expensive then a typical high end 2D set...the 3D was just another feature...plus 3D eventually became available on even lower end TV's...you can say the same about VR hardware...the hardware manufacturers like Nvidia/AMD/Intel etc are loving this...now they can sell more 980 Ti's or high end CPU's to people in a previously niche market
watching movies at home on Blu-ray/DVD is more comparable to VR gaming...and in that instance you don't always watch with family, friends etc...it can be enjoyed just as much solo...to say that the headset won't be a limitation is crazy...even the most die-hard VR fans know that it will be a major issue (same as 3D glasses)...I do think VR has much more potential in other fields such as engineering or architecture...but for serious gaming I don't think it is viable in its current form...I want to see someone play (and enjoy) Dark Souls 3 or Arkham Knight or Witcher 3 with a VR headset...unless they seriously dumb down games to be compatible with VR then it's not happening