With the tools available in digital photography, you can enhance an image in ways never dreamed before...
Or at least in ways that are easy for anyone to do. A lot of todays techniques could have been achieved with film, but it would have requited a very skilled photo artisan to do them.
Besides increasing the Dynamic Range of an image (HDR) far beyond the values you could achieve with one single image,
is a process by which you increase the Depth-of-Field
far greater than one single image exposure could ever capture.