Pretty much every movie director loves the look of film. It’s rich and high in resolution. No other method of capturing moving images has ever been able to match its fidelity…until now.

With the advent of video that’s now as high in resolution as 35mm motion picture film—paired with software that can give video a “film look”—digital is now a viable contender to the throne of moving-image capture.

But not everyone is ready to surrender their sprockets. Sure, for a while now, movies shot on film have been edited digitally. And more recently, film-shot movies are being shown digitally in theaters (even in 4K resolution—which roughly matches the resolution of 35mm film). But—Avatar and some recent Star Wars shoots aside—is Hollywood ready to start shooting in bits?

That’s the question asked by this new documentary, Side by Side (trailer above), produced by (and starring) Keanu Reeves and featuring interviews with Hollywood’s top brass, including Geroge Lucas, James Cameron, David Lynch, Steven Soderbergh, and many, many more.

Should you happen to be at the Berlin International Film Festival this month, check it out. Though we’re wondering: Was this documentary shot on film or video?