https://arstechnica.com/gadgets/2021/04/apple-updates-the-apple-tv-4k-with-the-a14x-processor-new-remote-prewrite/

The Apple TV 4K set-top box will receive some needed upgrades, particularly to the remote. Today at an event largely focused on the new M1-powered iMacs and iPad Pros, Apple told attending press and livestream viewers that the device will begin shipping with the A12 Bionic CPU inside it. The previous model introduced in 2017 included the A10X.

The A10X was a system-on-a-chip that included several components including a CPU and GPU; it was included in Apple's 2017 iPad Pro tablets and is based on the same architecture as the iPhone. (The iPhone chips lack the X or Z in the name—for example, A13 or A14.) The A10X and the A12 Bionic are more powerful than their iPhone counterparts, though, especially when it comes to graphics performance.