[ssalazar]

In markets with unreliable, inconvenient, or overpriced taxi service your options before Uber were to drive yourself, have a friend drive you, use public transportation, rough it in a taxi that may or may not show up and do so 30 minutes late, or simply not go. Since low quality was previously a barrier to using any taxi service at all, it absolutely creates demand.

[mseebach]

It seems that what you're describing is "simply" meeting existing unfulfilled demand, not creating new demand. Creating new demand would be when you move to a part of town with poor public transport because you can now Uber.