Apple has discontinued sales of its fourth-generation Apple TV after unveiling the new Apple TV 4K at its Take Note event on Tuesday.Apple announced two versions of the Apple TV 4K on Tuesday, which feature an A15 processor and varying network and storage options.The introduction of the new device has seemingly bumped off the Apple TV HD, which was introduced seven years prior. The 2015 Apple TV HD was the first Apple TV to run tvOS and the first that came with the Siri Remote.Read more