3. 3D
Think of all your favourite movies. It's highly unlikely that you'd consider them improved by a 3D upgrade, that The Godfather would be more of a masterpiece if you were able to touch the contours of Marlon Brando's face. Now recall all those 3D films you've seen - is it the 3D technology you remember, or the way the story was told? Film is a visual medium, so the way movies look is important, but no visually arresting masterwork (from the likes of, say, Malick or Lynch) was ever any less so due to its lack of 3D. Moreover, going from a 'flat' image to 3D does very little, as we already view cinema in three dimensions; cinemagoers have not spent the last 100+ years confused out of their minds because the projecting screen was flat. Our eyes already interpret the film image in 3D. The 3D fad is a moneymaking gimmick (like HFR) and nothing more, costing us roughly double to have a virtual headache shot directly into our eyeballs. Those who can't see it's only there to rake in the cash that 2D film has been losing are, unfortunately, incorrect.