They're doing fine for now. Electric-car optimists think they'll be replaced by charging stations. Apocalyptic doomsters think they'll be replaced by a place to feed & water your horse (or by nothing at all). Both camps seem to agree petroleum fuels are a temporary thing.
Observationally: No. If parent was referring to less vehicles due to advances in transportation technology and pattern optimizations...I think broadcast TV dies much sooner than gas stations.
In big cities, I think that between higher fuel efficiency and the small margins that stations make, it's not surprising to see the smaller stations close. (Anecdotally, in my neighbourhood, a few stations closed, our tiny neighbourhood/borough of 60k people had a dozen gas stations, now down to 5)