Hi, I'm interested in buying an Apple TV however I don't know wether I should wait until September just in case Apple release a new Apple TV. Any opinions on the product would also be welcome.
Yes. Once the ATV is connected to your TV, you enable Home Sharing (on both your Mac and the ATV) and then log into your iTunes account (on both the Mac and the ATV) anything in your iTunes library that is compatible with the ATV (see Apples ATV tech specs page for details) will stream to your TV via the ATV. This includes Audio (MP3, MP4 etc) as well as Video (M4Vs etc).