I wanted to throw this out there, just to see how far from being right I am, when this thing will be announced. I base my assumptions on the development progress done by Samsung and others in the televisions field, who might be well informed about Apple’s roadmap - as I am just guessing. So here goes…

I think the Apple TV will:

1. be controlled by an iPhone / iPad app (as a remote)
2. be a brand new hardware device – so it won’t be an iMac with TV abilities
3. be connected to the internet and run on iOS or an OS based on OS X. (email, pictures, music, etc)
4. have TV as an app, and allow for apps to be purchased / built for  it (App Store)
5. be social and interactive – as in, you can share tv shows, save them for later, watch schedules and so forth
6. have a camera and possibly facetime integration

I believe it will change the way we think about television, and do to Samsung / Sony / others what it did to Nokia.