Apple TV

Apple TV is a digital media receiver developed and sold by Apple Inc. It is a small form factor network appliance designed to play IPTV digital content originating from the iTunes Store, Netflix, YouTube, Flickr, MobileMe, MLB.tv, NBA League Pass or any Mac OS X or Windows computer running iTunes onto an enhanced-definition or high-definition widescreen television. Apple offered a preview of the device in September 2006 and began shipping it the following March. It initially shipped with a 40 GB hard disk; a 160 GB version was introduced two months later and the earlier model was ultimately discontinued. In September 2010, Apple announced a second-generation version of the Apple TV. About one quarter of the size and one third of the price of the original Apple TV, the new device can stream rented content from iTunes and video from computers or iOS devices via AirPlay. The new version no longer has the hard drive; however, it does have an undocumented internal 8 GB flash storage, speculated to be used for smoother playback of streamed media. All content is drawn from online or locally connected sources.

First Generation
This generation has both HDMI and video out, unlike all other generations.

Second Generation
This model dropped the video out ports so it can be smaller. It is one quater of the size of the previous generation.

Third Generation
This generation has the exact design as the previous generation. It supports 1080p vodeo content.