If the definition of the cinema art form includes the cinema place, then you're invalidating every movie experience you've had at home. I will instantly grant you that my watching Lawrence of Arabia on a giant screen was an unfathomably superior experience to my originally watching it on my laptop, but I had still experienced the movie that first time, the essence of it was not altered by my tiny, imperfect screen. The « is it still cinema if it doesn't happen in a cinema » phrasing is misleading because we came to use the word cinema to mean the art form at a time when the only way to watch movies was in a cinema, or at least, in a projection room.