Apple TV is a digital media player and a microconsole developed and sold by Apple Inc. It is a small network appliance and entertainment device that can receive digital data from a number of sources and stream it to capable TV for playing on the TV screen.
In terms of features, the latest Apple TV is really only different from the previous iOS based $99 model it replaces in that it can handle 1080p video and that it has an additional wireless antenna for improved WiFi reception that can support faster access to 802.11n wireless networks.
In order to play 1080p video, Apple replaced the previous model’s A4 chip with a single-core A5. This gives it computational power somewhere between A4 class devices (including the original Apple TV, iPad and iPhone 4) and last year’s dual core A5 products (iPad 2 and iPhone 4S).
This is the opposite direction Apple took with the new iPad’s A5X, which took the basic design of the A5 and added twice as many graphics cores. Like the new A5X iPad, the single core A5 variant in Apple TV is given twice as much system RAM as the previous generation.
While the second generation Apple TV had 256MB, the newest model has 512MB, giving the system more breathing room for pushing around larger (and better quality) videos. Additional detail on the new Apple TV’s hardware capabilities is presented on the final page of this review, after an overview of its new software features.
#source : businessinsider.com