I've seen several movies projected digitally in theaters over the last couple years that I could've sworn were shot on film and weren't. Digital's capabilities are now close enough to film's for many of the directors and cinematographers out there. Certainly it's become hard to tell the difference as far as 35mm goes.

It's the things Abrams and Nolan and Tarantino are doing with film that can't be done digitally, like shooting in 65mm. Yes, there is currently a 65mm-sized Phantom camera that Imax uses, but it's only 4k and still not nearly as big as real 15/70.