I doubt we'll ever return to a TV environment where the episodic format predominates. All the trends are towards greater niche-ization of TV (and whatever you call it when "TV" is predominantly streamed thru the internet), which favors serialized formats for being better able to grab niche audiences while the episodic format is better for the casual viewer/mass audience environment. This isn't "fashion," it's a long-term trend being driven largely by technology.
But in terms of storytelling in general, there is no qualitative difference between the short form and the serialized form.
Not in the abstract, no. But in reality, yeah.