a grain effect added to a digital photo is a kind of affectation, an artifice that is not intimately connected to the process of making the image, included as a stylistic decision; possibly an afterthought. it seems dishonest (not necessarly wrong) but it is part of a panoply of effects that can be applied that constitute what's possible with digital. there's no need to 'lament' since each medium has its own panoply of possiblities: photochemical emulsion gets to be 'honest' about grain, however, and digital does not, since with emulsion grain is not an 'effect': it is what emulsion, in fact, consists of. the same cannot be said about digital.

there are analogous issues between film and video, and even between older video formats and digital video. the future of movies no doubt includes a choice of frame rates, frame resolutions, interlace vs. progressive, and aspect ratios as creative choices. they will be part of the panoply of possibilities that artists will be able to use.

n.b.: in the silent era, there was no real standard film speed, and the film was often exhibited (in the days of hand crank projectors) at varying speeds to suit the content of the image and the music that was invariably played live alongside it. for example, romantic scenes might be cranked a bit more slowly; comedy scenes could be cranked a bit faster. it was only when the industry started to be professionalized that silent films were shot a 16 or 18 fps. with the sound era, the fps was upped to 24 partily to improve the fidelity of the optical sound. most projectors have for decades now multi-leaf shutters which actually interrupt the light path as many as 3 times per frame elimitate the perception of flicker.