As an Apple user since the early days of OS X, I remember watching that part of the presentation thinking to myself "he knows he doesn't need to elaborate on that."

I think many of us watching Apple for the past two decades have seen the OS move slowly towards closed standards and tighter control instead of openness and functionality. Each time I boot my PowerBook G4 running Leopard for a nostalgia kick, I'm reminded of how great OS X once was.

But as Ken pointed out, they've been doing it over a long period of time, so it's OK (i.e., it's given us plenty of time to move to other alternatives).