The common definition of 'monopoly' is the sole provider of a good or service. I doubt very much that Uber can ever achieve that. I much prefer 'market share',

The common definition of 'monopoly' is the sole provider of a good or service. I doubt very much that Uber can ever achieve that. I much prefer 'market share', I think it's the most accurate term. Aside from that, I do see some parallels with eBay.