"Sports" is not about to pop. Anecdotally, I would assert sports (NFL, NBA, futbol/ soccer) seem to be growing more popular to every day people.
What is potentially about to pop is the "entertainment" apparatus around Sports. Ie ESPN's programming the majority of hours per day that sporting contests are not airing.
It feels like ESPN is going the way of MTV. I doubt that music is less popular than it was in the 90s, but the one of its strongest previous consumption channels was disrupted by dozens of access/ consumption points - and simultaneously instead of dedicating themselves to airing music videos, MTV began to divert a lot of their airwaves (and I would assume resources) to reality TV and non-music video content.
ESPN (specifically) is in a similar position. On one hand, they appear to be working hard to offer streaming options - but they haven't gone all in on any type of consumption based or bulk access (to my knowledge)...
Instead, they put "characters" like Mike&Mike or Stephen A Smith to put on shows that are related to sports.
Unfortunately for ESPN there are too many content options (as well as competing sources for contract rights) for them to skate on thinly veiled sitcom characters and _very_ poor quality highlights in a world where we aren't locked in to 1 or 3 "channels" to access what is happening in the Sports world.