About a year ago, Tesla announced its plans to develop self-driving car technologies, and now founder and CEO Elon Musk says theres still quite a bit of work to be done before thats a reality. Another 5 to 6 years, to be precise. In an interview with The Wall Street Journal, Musk says that the various technologies needed to make that happen still needs years of work to perfect, and that it could take a few more after that for laws and regulations to catch up.