Introduced during Apple's September event, the is an update to the fourth-generation, with the newest version of the set-top box primarily adding the ability to stream at the high resolution, making it a useful purchase to owners of Ultra HD televisions. While it is a new model, Apple will be selling the Apple TV 4K alongside the current Apple TV, rather than replacing it. AppleInsider has, giving it a score of 4.5 out of a possible 5. Hardware At face value, there is little to differentiate between the Apple TV 4K and the Apple TV, with both having almost identical external appearances. The Apple TV 4K measures 3.9 inches square and 1.4 inches high, and weighs 15 ounces, all of which match the Apple TV's dimensions and weight.