>> I disagree completely. Uber's inception/success was partly because of existing taxi services' "barriers to entry". Medallions were worth about $1 million each when Uber started in NYC (
http://bloom.bg/2aCEeQA). That's a textbook case of an economic rent.
I live in NYC and if you look at my other posts to this article, you'll see I made the point that before Uber/Lyft the medallions went for $1.2 million.
Still, Uber/Lyft are way, way too expensive compared with other cities in USA and this is from the "legacy pricing" from the pre-Uber/Lyft days. Also, the "surge" pricing is really annoying and makes it Uber/Lyft far more expensive than taxis (they have the Arro app). I've had surge pricing on a Saturday morning! Hardly rush hour when it is raining! (I didn't use it).
>> Besides Uber's barriers to entry are it's scale (low prices and reliable service)
Uber does not have low prices in NYC. In other cities I've used it they are lower, eps. Uber-pool when it is available. Don't take my word for it. Check the Uber prices of NYC vs. Chicago or other large cities. NYC is about twice as expensive.