While Apple revealed as part of its notes on the new iTunes 10.5.1 beta 2 released earlier today that iTunes Match is now available for testing on Apple TV, the option is appearing not just for developers but also for regular users. The general public is unable to activate the feature, however, as subscriptions to iTunes Match must be initiated through iTunes 10.5.1, which has yet to see a public release.
The second-generation Apple TV has lacked a "Music" section on its main menu page because Apple has not offered any streaming music services, although users are currently able to stream music content from their computers via Home Sharing in iTunes. That option is accessed through the "Computers" section on the main menu page.
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Because it was not announced for ATV until today?
Now you don't need your computer on to stream music to the ATV - this has not been possible with the ATV2 until now. Seems like news to me.
I think it just hints that you may be able to have other things streaming to the ATV (and other devices) "from the cloud" - IE movies and TV shows.
One could only hope.
You could conceivably delete all your content but the danger in that is that there is a clause in iTunes Match that says that Apple will only allow you to re-download your music as long as it is still available in iTunes. If the distributer delists it, you're screwed.
A better decision would be to relocate your iTunes library to an external hard drive, disconnect it and store it in a safe place as insurance. Every now and then, update your physical library on the external as you buy new music.
Ah, I get it. But if everything is purchased from iTunes (which I guess would be the case if you had iOS devices but never synced them to a computer) you wouldn't need match. It sounds like they just need to add support for listing purchased songs on the aTV if they don't have it already.
Accessed to music purchased through iTunes store is already available and has no extra charge, Match will only be needed for songs you got elsewhere.