<ul data-eligibleForWebStory="false">Elon Musk teases that Tesla will hold its most epic demo by the end of the year.Musk hinted at the upcoming demonstration after visiting the Tesla Design Studio in Hawthorne, California.Speculation arises that Tesla might unveil the production version of the next-generation Roadster as its flagship product.The demo could help Tesla regain its position as a top player in the electric vehicle market.