MobileEye is the company to beat in autonomous driving. They license their tech to automakers representing 60% of industry units. Toyota is the notable holdout. Mercedes is one of the only automakers working on their own solution from the ground up. Google is taking a completely different approach so might enable them to leapfrog the others. Tesla really isn't the innovator in the space - they work more closely with MobileEye than any other automaker, so that's what enables them to get things first.. But Tesla's Lane keep feature will be available in other high end cars over the next 12 months or so. Would be interested in confirming that if anyone has more info
I think what is happening is that Tesla and other are using Mobileye to varying degrees. Mobileye probably provides the sensors and imaging firmware. It is unclear how much of the application programing, if any, Mobileye provides to tesla.
Tesla is willing to risk delivering more functionality to the end user. Tesla will probably take the autonomous driving lead in the few months, but that doesn't necessarily mean they are the furthest along in development. Traditional auto makers are going to go as slow as possible, of course.
The upside for Tesla is gaining experience with civilians using this advanced technology. Hopefully accidents won't be too frequent. The thread of the guying rear ending stopped traffic (in Turkey?) while using adaptive cruise controls is perhaps an indicator of the near future.