Shared Screen will rule them all
The new Apple TV will do well by my prediction for 3 great reasons.
1 The shared screen / shared experience. You can play multiplayer on your devices and pass and play. But you need two devices running the same apps. That works but it's a disconnected experience compared to playing a game live, with someone. And some games have great multiplayer but it's still a bit disconnected unless you are lucky enough to be in the same room. Think family game night. Think families experiencing the Wii for the first time. Much more intimate. Shared Screen / Shared Experience.
2. Universal Apps. This is huge! You have Crossy Road on your iPod? Now its on your TV. Benefits everyone. Consumers get the most value for their money. And devs get new exposure and a whole new store to sell their products. Who knows, perhaps this will put the perceived up front value in paid games/apps back up a notch. Could be wishful thinking but perhaps Free To Play won't be the only game in town anymore. For a time perhaps. I can dream.
3 It is relatively difficult to become a dev for the high end consoles. It's simply because there are only so many dev kits they can make available and the game approval process is more involved for lots of reasons specific to high end consoles. It's not the creation tools that are hard to get, its access to the platform. You basically have to prove your studio with decent past success on PC game market before you can get invited in. In contrast, with Apple TV you get loads of great devs making great games and apps - no hurdles. Everyone wins.
Today wasn't about content deals or new TV display hardware. Thank the heavens it was about making Apple TV a proper part of the Apple Family of products.