US electric vehicle manufacturer Tesla plans to unveil its long-promised “Robotaxi” self-driving car on August 8, Tesla boss Elon Musk announced on Friday. Musk, the billionaire entrepreneur, did not provide any further details in his very brief post on the social media platform X, formerly Twitter, which he owns. According to earlier statements, the autonomous vehicle will be based on a new technical platform that is intended to make production more efficient and cost-effective. Musk has been promising for years that Teslas will drive autonomously – and that this will radically change the val…