Three-dimensional bummer Seven years. That's how long it has been since the incredible success of James Cameron's Avatar, which marked the beginning of the 3D revolution in cinema, to the curtailment of 3D-enabled TVs by all major manufacturers. LG and Sony were the last to give in: at the end of January, both corporations announced their refusal to use this technology in upcoming models. And this is despite the fact that according to the results of sales in 2012, 3D TVs occupied 20-30% of...