NBC Universal's streaming service will be formally unveiled on Thursday. "And, puzzlingly, there is buzz that Comcast will try to give Peacock viewers an early glimpse of The Tonight Show," says Peter Kafka. "Jimmy Fallon and company usually tape that show at 5 pm Eastern time, but it doesn’t air on NBC until 11:35. Offering Peacock viewers the chance to see bits of the show in advance sounds plausible, though not much different from what networks already do to promote their shows. Much more daring would be a move to put the entire show online for Peacock viewers (or at least ones who pay for cable TV subscriptions), because that would cause havoc with the local affiliates and cable operators that pay big fees to NBC and are already worried that streaming is cutting into their business. It would also be head-scratching, since The Tonight Show is not Game of Thrones: Even if you like to watch it, you probably don’t need to see it a few hours before anyone else."