Will there be a significant "first-mover" advantage in self-driving cars? Will the first company (or group of companies) to bring the technology to market enjoy significant long-term advantages over rivals that lag?For a long time, I didn't think so, for reasons I'll explain in a moment. But General Motors (NYSE: GM) president Dan Ammann recently made an argument that has me thinking I'm wrong -- that the first (and maybe the second or third, but probably not the tenth) company to put lots of autonomous vehicles on the road will indeed have a big advantage over its rivals for years to come.GM's self-driving hardware, a modified Chevrolet Bolt EV, is ready for mass production.