Are you seriously comparing scaling these businesses with scaling online media companies ?
If dealing with logistics issues at scale would have been easy, your grocery store would have been able to deliver to your home. Do they ? No -- because its not cost efficient due to the logistics involved.
I don't think you're reading these comments in context. I'm arguing that even if they only reach the major urban areas, they'll still be a large, profitable company. You're responding that reaching beyond them is logistically difficult -- again, "so what?". If you want to answer my comment, you have to say something as to why TaskRabbit has to be available in the 'burbs to scale.
The purpose of the comparison to Netflix was to emphasize that the addressable market for your product or service need not be "every household in the nation" to be considered "at scale". It's OK for TaskRabbit to never offer all its services in every suburb -- because it's logistically difficult or impossible -- they still have the potential to be a large, profitable company without doing so. I never made a comparison between how easy or difficult it would be to grow.
If dealing with logistics issues at scale would have been easy, your grocery store would have been able to deliver to your home. Do they ? No -- because its not cost efficient due to the logistics involved.