Google Chromecast Ultra
Engadget: 8.0
The Chromecast Ultra does exactly what it promises to do: reliably stream 4K HDR video to compatible TVs.[source]
4K and HDR Support
4K UHD's high resolution enables improved clarity over 1080p Full HD while HDR provides deep, rich colors. Note: To view content in 4K or HDR, a 4K- or HDR-capable display and reliable broadband internet connection are also required.
Remote Control from Your Device
Just tap the Cast button in mobile apps and websites you already use to start casting right to your TV. Use your phone, tablet, or laptop to play, pause, and adjust the volume; all without draining your battery
Entertainment Apps
Chromecast Ultra works with popular apps you like Netflix, YouTube, Google Play, Pandora, and more, enabling you to choose your favorite movies, TV shows, songs, sporting events, and games. Note: 4K not available on all apps. Some apps require subscriptions.
Mirror Your Android Phone or Chrome Browser
See anything on your Android phone or tablet on your TV's larger screen, or use your laptop to cast any website from the Chrome browser. If it's online, you can cast it.
Dual-Band Wi-Fi Connectivity
Chromecast Ultra is designed to keep video resolution high and buffering low thanks to integrated 2.4 and 5 GHz Wi-Fi support and a built-in 1x2 SIMO antenna system. Because content is streamed straight from the cloud, movies and TV shows play without interruption, even if you and your phone leave the room.
Ethernet
For users with slow Wi-Fi connections, Chromecast Ultra comes with a power adapter with an integrated Ethernet port, so you can plug directly into your home network.