Two more examples is anonymity and universal access. In order to use the new ride-sharing services you must own a smart phone and register ahead of time. No anonymity, and if you don’t have an expensive phone (or if you’re traveling internationally and don’t want to shell out for a local phone contract or pay extortionate roaming fees) you’re SOL.
I have no particular loyalty to the taxi industry. Find a way to replace it that preserves the above things and I’m all for it. Until then, however, there is a public interest in preserving taxi service.