In a city (where gas stations are abundant): indicator lights up, hey look, I'll be passing (any) gas station within five minutes. Outside a city, let's say I'm an hour's drive from a gas station - now what, a gas truck drives up to me? That might be somewhat expensive...
Now, if this included periodical check-ups (lights, various fluids, pressure etc.), this might be interesting.
This could be a workplace option. Find a large business, present this as a benefit, sign up all the people too busy to stop by gas stations.
But it would have to be absolutely automatic, zero-touch, f.ex. I wouldn't give anyone my keys and I wouldn't want to instruct anyone about where my car is parked at any given time.
You are probably thinking on putting a movable gas station (read: truck) inside a private parking lot (where people pay monthly). I think that would work great in NYC.
But I see this as more of a feature.
I think that there certainly is a market for this sort of service, however I'd need to know a little bit more about the specifics to give a better answer.