Film is light. Digital is a bunch of 1s and 0s
Digital has fixed resolutions. Film is silver halide crystals 'painted' on a strip of plastic (it doesn't really have a "fixed" resolution. Not all the crystals are in the same place for each frame. It moves - it's very organic and a major component in the look of film). Depending on a number of factors (ASA speed, color/BW, reversal/negative) the crystals will be bigger or smaller.
Now here's what I'd like to see: I'd like to see digital try to capture light in a way that film cannot. I'd like to see digital technology not TRY (I stress this word) to act like film, but become its own entity.
In fine arts, you have watercolors, acrylic, oils, not to mention canvas, glass, copper to paint on. All these different tools to give you different feels and looks.
I would wish people would stop trying to kill off film, and embrace it for what it is. Then I want people to stop embracing digital for what it isn't and instead explore what it can be.