Watching in the cinema is a completely different experience. Going out of the house and making a journey somewhere builds up the sense of occasion, especially when it's combined with a nice meal somewhere beforehand. Watching a film as part of a large audience is also a better experience than watching at home. Sure there are certain audiences that are annoyingly chatty, but for the most part I have a good experience with fellow film-goers. Watching as part of an audience helps you to pick up on things that you wouldn't notice otherwise. Also, the inability to pause means that you have to put your phone away and give the film your undivided attention. Watching at home leaves you prone to more distractions.