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It's almost as if this were a developers' conference instead of a consumer product show, or something...
I'd bet that about half of the major new and updated front-facing features in Yosemite and iOS 8 won't be publicly announced (might not even be in the developer beta releases) until the fall event where they introduce this year's iPhone and iPad updates.
And I'd love to see a new Apple TV (set top box, not an actual TV) along with changes that allow 3rd-party developers to add "channels" (or "apps") to the device, but if it's coming, they've kept it closely under wraps so far.