I think 3D is pretty much dead in the water, the effect wasn’t subtle. However 4K gives a 3D effect because the definition is high enough to allow the brain to use the visual clues that is as much a part of 3D as stereoscopic vision.
People who are blind in one eye still perceive a 3 dimensional world, and while accurate location of an object in 3 D space may be impaired, it doesn’t go away.
I saw a demo of 16K TV at a trade show (albeit on a 150” screen ) and the perception of depth (allowing for the fact that the footage was probably shot to emphasise it) was extraordinary (or perhaps I should say outstanding )
16K will be many years off, if only because of the bandwidth requirements and the cost of investment in equipment.