Yep, it's gone. I remember specifically seeing a WWDC icon on my ATV yesterday, but it's not there now. I even looked in Settings > Main Menu to see if I accidentally set it to hide, but it's not there either. Weird.
Not really pointless when the content is available through the Podcast App. It is pointless leaving both methods of accessing the content. Having it temporarily there is a means of highlighting upcoming, current, or recent events and once that time has passed there is no reason to keep it around when the primary method of access is through the Podcast App.