Apple TV 4K ($179)
The aging Apple TV is getting a refresh with 4K resolution (which is four times the pixels as HD) and HDR color performance. It uses HDR 10 and Dolby Vision HDR tech, so it's compatible with the most common HDR protocols. Watching these 4K demos over a semi-crummy internet stream doesn't really translate.
It has the new A10X Fusion processor inside like the iPad Pro, which gives it double the processing power and four times the graphics performance.
Apple is bringing lots of 4K titles to the iTunes store, and if something you've already bought gets the 4K treatment, you'll get the upgrade for free.
One of the draws of the new processing power in the Apple TV is an upgrade in games available for the system. They're currently demoing a game called Sky, which the developer designed as "social" and "romantic," as opposed to "anti-social" and "full of murder" like most video games I play now.