What if I live outside the U.S.?
As with the previous Apple TV, content availability and terms vary depending on the country. Similarly, depending where you live, your iCloud and iTunes Match features may differ from those in the U.S.
Will the 2010 Apple TV support the new features via a software update?
The 2010 Apple TV (which Apple calls the second-generation model) will get the new user interface via a free software update. However, the older model won't gain support for 1080p video, as it doesn't have the necessary hardware.
So what are the supported video and audio formats?
The new Apple TV supports H.264 video at up to 1080p resolution at 30 frames per second; MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels at 30 frames per second; and Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, at 30 frames per second. (Apple's tech specs page has more details about supported video profiles and audio tracks.)
In terms of audio support, you can play HE-AAC, AAC, protected AAC, MP3, MP3 variable bit rate, Audible, Apple Lossless, AIFF, and WAV files; the Apple TV also supports Dolby Digital 5.1 pass-through.
What kinds of connections does the new model have?
As with the previous model, the new Apple TV sports an HDMI output for digital audio and video, a Toslink-optical output for digital audio, a 10/100Base-T ethernet port--sorry, no Gigabit ethernet yet--a Micro-USB port for service use, an infrared receiver for the included remote, and 802.11a/b/g/n for wireless networking.
Can I connect an external hard drive to the Apple TV?
As with the previous two Apple TV models, the USB port on the back is designed for only "service and support." Products such as ATVFlash have been able to use the Apple TV's USB port to allow for things like external hard drive storage and more media features, but these are unsupported additions. Given the similarities between the new Apple TV and the second-generation model, we suspect the current version of ATVFlash either works with the new Apple TV or will quickly be updated for it.
Has AirPlay changed at all?
AirPlay functionality appears to be the same as with the previous Apple TV: You can stream music, photos, and videos to the Apple TV from AirPlay-enabled apps on your computers or iOS devices. If you have an iPhone 4S or iPad 2, you can also use AirPlay to mirror that device's display to the Apple TV.
Has the Apple TV's remote been improved?