https://www.apple.com/newsroom/2022/10/apple-introduces-the-powerful-next-generation-apple-tv-4k/Apple TV 4K (Wi-Fi + Ethernet) offers support for Gigabit Ethernet for fast networking and streaming, Thread to connect even more smart home accessories, and 128GB of storage.
If you are planning on using one of the new models as a Smart Home Hub with HomeKit and Thread-based smart home accessories, then be careful getting the Wi-Fi + Ethernet version, as it does not seem to be available with the Wi-Fi only model (as I read their text)