I also agree that SJ uses the hype machine every chance he gets, but that's also one of his roles as 'chief showman'. With regard to the 'top secret' features, I, like others, have no idea what he was referring to, but I have my own guesses, and those include ZFS and suddenly finding that your four cylinder engine was transformed into a V12 - mostly under the hood improvements that will be unfold over time.
Sorry, Children, Leopard's Top Secret Features Aren't Real