My primary camera is 4x5" film, and then I drum scan the film.
Depending on lens, film, and care with focusing and stabilizing the camera, it is at least 100 mega-pixels, and often better. We are just now seeing 80Mpix medium format backs from Leaf and PhaseOne that are equaling or outperforming 4x5" film. These backs cost $32,000 and $44,000. At $6 per shot for 4x5 color film and processing, that's 5000 or 7000 shots to equal the cost (although you should also count the time and inconvenience of scanning as some additional cost). But the film also captures RGB at every pixel, not a Bayer mosaic that has to be smeared together to get a full color at every pixel.
I carry a Canon S90 for snapshots. After setting up the large-format camera, I often snap a quick reference shot with the S90, as it will be days or weeks before I see the result on film.
If I had the spare cash to purchase a 60-80 Mpix digital back, a technical camera (ie. Arca RM3D or Alpa STC), and four Rodenstock lenses I would jump on it. But it is a very expensive proposition. My large format kit is all paid for, so film, processing, and time are my only expenses at the moment.