I also concern myself when I think about this. More generally, though. Like the next generation of filmmakers being inspired by more modern films rather than the older ones, not just anime.On the subject of what influences anime directors, I remember hearing that Satoshi Kon had a list of 100 or so important movies that influenced him and he was quite concerned because practically no-one left at Madhouse had seen them.
There's nothing inherently wrong with being a director whose been primarily influenced by anime but I am a little concerned where it leaves anime, in the longer-term. If you don't have any appreciation for the language of film but you work in it then a number of problems can arise. Sometimes cutscenes in videogames (I am looking at you, Bioware) can have this problem as well because you can tell that they only have a vague idea of how to shoot a scene or position a camera to create an effect in the audience.
There's nothing wrong with [good] modern films but they're so full of things learned elsewhere from the past that their potential for learning becomes kind of... diluted I guess. It's a troubling thought.
This... explains a lot of things.Ei Aoki, the director of Wandering Son and Fate/Zero, counts David Fincher and Christopher Nolan among his inspirations for tone and setting. He personally enjoys more edgy and gritty live action movies.