Keep your (reasonably sized) HDTV tuned to Speed Network this evening to check out the world's largest HD screen for yourself, when it makes its debut during the festivities for the NASCAR Sprint Cup All-Star Race. According to a tweet by the Charlotte Motor Speedway the debut should happen at about 6:50 p.m., and the main event race is scheduled to start around 9 p.m. Panasonic and CMS partnered
on the new screen and are paying for it by splitting advertising revenue including ads that will appear during the race and promotions like the History Channel's sponsorship of a NASCAR Nationwide race next week
. We've already seen virtual racing on the screen when Dale Earnhardt Jr. played some iRacing on it
but tonight is the first time the 16,000 square foot 720p LED screen will see real racing action.