If you're a serious, serious film aficionado and have about seven hours to kill, check out Anders Weberg's trailer for his new film Ambiancé.
It's only a trailer, of course. Weberg's full film, set for release in 2020, is 30 days long, and was filmed in a single take.
More about the film and the "slow cinema" movement in The Guardian.
PS - I crunched the numbers, and the duration of the trailer is roughly analogous to the length of the teaser trailer for "The Force Awakens" compared to the duration of the movie. In other words, the action in this seven hour trailer is about equivalent to the 90 second Star Wars trailer compared to the full feature film.