3D TV has been and gone, an expensive fad that revealed simply that people don't feel comfortable sat with 3D glasses at home.
4K TV is the latest home cinema leap (VR being the other big trend), and it seems the UK is a trailblazer in 4K penetration, expected to reach 50%+ of UK households by just 2021.
Convergence is a key factor - it's as much games consoles, the updated current PS4 and Xbox One consoles both offer 4K output and incorporate new Blu-ray models for movies too:
The home cinema market is in the midst of a revolution: according to analysis firm IHS Markit, by the end of 2017, 3.7m UK households will own a 4K TV, rising to 12m by 2021. This would account for almost half of all TV-owning households in the UK, yet the first Xbox One was designed only for full high definition – screens with a resolution of 1920x1080 pixels.
Xbox One X review: a perfect pitch to a demanding demographic https://www.theguardian.com/technology/2017/nov/19/xbox-one-x-upgrade-console-video-games-gadget?CMP=Share_AndroidApp_Blogger