The demise of 3DTV seemed pretty imminent when UHD Blu-Ray didn't even include 3D in the format specs, but there were always too many reasons for it NOT to catch on and far too few for it to become truly popular: Too many components required (TV, Blu-Ray Player / Game Console, Glasses) to achieve 3D and each component was usually sold separately. 3D was rarely a standard feature in the most basic/cheapest Blu-Ray players of almost every product line. No universally accepted standard for in-home 3D (Active Shutter vs. Passive). Too much coordination required by the consumer (Active Shutter 3D TV with Active Shutter Glasses or Passive TV with Passive Glasses). Glasses, particularly active shutter, were too expensive. Too much post-conversion 3D content (filmed in 2D and converted for 3D) with less than stellar results. Content was mostly limited to a niche market (3D) of an already niche market (Blu-Ray). Very limited support through gaming consoles. Overpriced 3D Blu-Ray content compounded with the fact that there were usually non-3D releases of the same movie that were priced much more reasonably. Avatar 3D, arguably the most famous and popular 3D film of all time, wasn't available as a standalone release until October 2012 and didn't include the extended cut in 3D. Bottom line: They didn't do enough to make the format accessible to the average consumer.