steve liesn has more from >> 50 years ago, the grateful dead embarked on a long, strange trip that changed the music business. is weekend, the former band members joined together for what is their last show together. it promises to be one of the biggest concerts ever with nearly 250,000 tickets sold ove night and then dead heads call the couch tour the ability tot on multiple media from anywhere in the world. >> whe you're watching on your home or tv you can go to a concert venue. it's across the country and they are having screenings you can go to movie theaters it's going to be in movie theaters around the worln see it at your house and sit on your couch. we tried to make it available to everywhere the two early shows in santa clara, california, the band included the ability to see it on the web and the first ever music stream on youtube. an estimated 100,000 people paid for it and watched the show. he thinks chicago could be many times that number as the band finds a way to monetize 50 years of goodwill. the grateful dead's most successf "a touch of gray" with fans streaming in from aro