If you succeed in moving the overton window to the right, formerly "neutral" media outlets now appear to be left-leaning.

This comment was downvoted and I honestly can't understand why. Given the way people use political terminology with reference to media bias, it's certainly true.

I've been guilty of pointing out that the US doesn't really have a left wing, according to the textbook definitions of things, but that's not how people usually talk. People really are talking about the median when they say "politically neutral," even if they shouldn't.

And here's the point: the median can certainly shift as the number of media sources shifts, or if you prefer, as the culture shifts.