It couldn't hurt D&D to shade into urban fantasy, it's been popular for quite a while now... well, OK, y'never know what might hurt D&D, but it'd seem like there's a potential up-side.Well, the Narnia/Fillory bits are one part of a larger multi-verse that feels very much D&D and would fit into it fairly easily, IMO. I'd kill for a Magician's Sourcebook for 5e, think that would be an excellent way to introduce an urban setting.
One sort or 'nuther, I guess.And of course with 5e, just about everyone now IS playing a magic-user
They lampshaded "Magic Missile" in one episode I recall, though, it behaved nothing like the traditional spell (must've been 2008 or 2009 , when you could miss ).Agreed, and many of the spells in the Magician's are straight out of D&D. I know the books made that connection explicitly, can't remember if the show did, though they do name check Bigby and a few others as spell creators...
They've made it clear the characters are aware of D&D, too. Heck, Quintin's probably played it.