I believe in Valve. And maybe Gabe doesnt "care" about CS:GO that much, but they not stupid either, Zeus also said it.. he probably had some inside info, that valve told him that CS:GO cannot keep it's course anymore, and future surprises are coming.
Like I said tho before, Valve does it EVERY year on the International.. yeah its their "main" game, but everytime they do it, its usually a pretty big one future update that impacts the game. It's not like some kind of small future update, meaningless. :D
I would just try to not miss any moment of the stream..