Lucas Jackson/Reuters Warren Buffett and Berkshire Hathaway aren't prepared enough for autonomous vehicles and alternative fuels. The billionaire's recent acquisition of Pilot Travel Centers exemplifies how short-sighted his view is. Berkshire Hathaway Inc. is one of my favorite companies, and a stock that I have generally expected to own for decades. Under the stewardship of Warren Buffett and his underappreciated investing partner Charlie Munger, Berkshire has generated life-changing wealth for a huge number of people over the past four decades. But even with all of this success, and a good chance that Berkshire will remain a strong company for many more years to come, I have concerns about how well the company is preparing for two big changes that could affect the cash flows in the years ahead: Autonomous vehicles and alternative fuels.