Television manufacturers are constantly looking for a premium feature, since the profits are so slim on the lower end. 3D was one such feature, but had a benef

Television manufacturers are constantly looking for a premium feature, since the profits are so slim on the lower end. 3D was one such feature, but had a benefit for non-3D movies in that it needed significantly more backlighting for active glasses to not give an overly dim experience. 3D was also odd in that normally such features get adopted first by a higher tier "early adopter" market - but because of Avatar and other family friendly 3D content, it was generally purchased by families. Perhaps its biggest early negative was expensive active glasses handed to young children. HDR was another, but is somewhat spoiled by the lack of any good certifications/branding. Anything which can _process_ a HDR signal will be sold as a HDR television. Curved was so weird to me, but that is because I always mount my televisions. Curved was a byproduct of the processes allowing for it. Since the curve has a fixed radius, it does lock you into a viewing distance 'range' that isn't always going to work for people. 4K was yet another, and partly what pushed 3D out in the US market. Active 3D also had a hard time with pixel ghosting - each frame was different from the previous. Smart TVs are a different approach - sell advertisement and premium channels, I suspect in the future even put services like Uber Eats on TVs, all for secondary revenue channels to make up for how tight the primary sales channel is.