If you think someday you'll buy a 4K TV (or possibly receive one as a gift), the price difference between the 1080p Apple TV and the Apple TV 4K is small enough that you might as well get the upgrade. But if you have no plans within the next few years to get a 4K television set, you should invest in the fourth-generation Apple TV instead.Does Apple TV have 4K content?
As we all know, Apple TV 4 does not support 4K video streaming from Netflix and Amazon, but your Mac and Windows PC do (also your iPhone/iPad)! You can stream 4K content on your PC/Mac and then AirPlay mirroring to your Apple TV 4.Does Apple TV 4K need special HDMI cable?
No, Apple does not provide an HDMI cable with the Apple TV 4K. The box contains a power cable, Lightning to USB charging cable, Siri Remote and the main Apple TV unit. In order to make the most of the Apple TV 4K, a compatible 4K display is required. Apple also recommends a Dolby Vision compatible HDMI cable for 4K HDR video.