Only an 8 bit sensor though, so highlights may blow out easily. The Kodak sensor in the Leica S2 (a mere 37.5MP) is 16 bit.
These are way superior to medium format, which always had problems with film flatness. Whether the lenses are up to it is another thing.
Incidentally, you can get an 123MP file by scanning a 35mm neg with a fairly average modern film scanner, but you're way beyond the maximum resolving power of the lens and film by then. Most people struggle to get 20 lp/mm on 35mm film, which is equivalent to about 1000ppi. I have a lens that is claimed to beat 100 lp/mm, but to see it you need some impossibly slow b/w film like the old Kodak Technical Pan.