I think that's just one of the issues with watching stuff at home. We have those other distractions and there's no penalty to looking at your phone or talking with someone else. In a movie theater, that's not acceptable (or at least it shouldn't be, I see way too many people pulling out their phones and distracting me with the brightness while the movie's playing). James Cameron made a point about that recently; when you see a movie in the theater, you're consciously choosing to give yourself entirely to a piece of art. All of your attention is on the sight and sound of the movie (or again, it should be) for however long it lasts. The home viewing environment is just entirely different.