Bluntly, no, it hasn't. Virtually every company in this space started with an app, some IT infrastructure, and at least one driver. That's all that is required to get started ... at the moment.
You just answered your own question - if Uber raises rates, then there's space for a lower-priced competitor to take some of the market. (That is, unless you believe that price doesn't matter to Uber customers.) Millions for staff, app development, and driver recruiting are not required - especially when there are existing pools of experienced staff, developers, and drivers. In fact, competition is often created when members of an existing company see ways to do things better, so they split off and form a competitor.
The economic ignorance of this article is appalling. Uber is not even close to a monopoly or a monopsony, and the market they are in is both growing rapidly and becoming more crowded. Many of the key features of a monopoly, such as strong barriers to entry, simply don't exist - compare the Uber market to the traditional cab market, which is a government-enforced monopoly (or oligopoly) where market entry simply cannot be had at any price. (And this is something that the author clearly understands!)
The characterization of the Amazon/Hachette issue as the exercise of a monopoly power over a helpless publisher is beyond ridiculous - Hachette is one of the five largest publishers in the U.S., with the Twilight books among their products, and Amazon only controls 50% of the market. What's next, a "monopolist" being someone who only controls 25% of a market? 10%? Amazon and Hachette are having a pricing dispute - nothing more. You can buy Hachette products at literally a hundred other websites, and Amazon can do nothing to stop them. While it may hurt them not to sell through Amazon, it hurts Amazon too. If Amazon was an actual monopoly, Hachette would have no choice - but it's incredibly obvious that they do.
Further, if Uber was a such a bad gig, why are so many drivers and passengers switching to using it? If Uber and companies like it encourage discrimination, how would that avoid encouraging competition that doesn't? And how could Uber "sit in the middle and avoid the overhead of the taxi world", and still drive up prices? Does the author believe that price doesn't matter to Uber customers and cab customers? Does the author believe that it's an accident that the cab market isn't competitive, even though he clearly understands why the cab market isn't competitive? And why does the author think that cab companies going out of business is a bad thing, when even he notes their tendency to abuse passengers and drivers alike?
This article is basically complete rubbish. If you're not happy with Uber, use a competitor - the cost of changing is almost literally nothing, and there are plenty to choose from. That's how markets work, and this one hasn't been broken yet by the politicians and their cronies - if left alone, will provide better service at lower cost.