When the ship’s going down, any piece of flotsam can look like a life raft. So it was yesterday at NBC’s executive session at the Television Critics Association Press Tour, where, according to Alan Sepinwall, Peacock President Bob Greenblatt crowed about his network’s recent third-place finish in the much-desired 18-to-49-year-old demographic. But it doesn’t take overpaying for the Olympics to know that the bronze medal is hardly good enough. With that in mind, Greenblatt went on to describe his vision for NBC’s future, and it was wildly different from its recent past.