[chkuendig]

I think its pretty clear from that page:

- You can use all the iOS Frameworks you know and like to build/port your full-fledged apps for apple TV

- You can build simple apps ("ideal for streaming media") with XML/JS.

This means everybody can hack something together to get their online video onto the apple TV (video bloggers, local tv stations etc), but obviously for more complex stuff (e.g. games) you'd use the usual frameworks from iOS.