Brands like Samsung, LG and Sony used to offer 3D TVs. Then they all vanished. Are we about to see a 3D TV comeback?

Gimmicks are nothing new in technology. Consider movie theaters, which for decades have tried things like IMAX, 3D, vibration ...

They're playing 17 movies. But you actually have 21 options because there's so many formats. Should you see "Toy Story 4" in 3D? Digital? Hang on, what's Dolby? And why does it cost 18 bucks?