Well the thing to wait for is not Musk's self-driving cars, but Musk disrupting the tunnel boring machine industry. Sure, Musk might not like public transit, bu

Well the thing to wait for is not Musk's self-driving cars, but Musk disrupting the tunnel boring machine industry. Sure, Musk might not like public transit, but his boring company could very well offer tunnel drilling services. Any improvement at all may cause other tunnel drilling companies to decrease prices. Of course, we really shouldn't be relying on Musk for things like this.