I picked one of these today, I own 3 other chromecast including the Chromecast Ultra. My setup is in my living room and it's the furthest from my router. I replaced the ultra with the Google TV version and tested out the wireless connection. My go to test is John Wick 3 in 4k @20.6 Mbps and wow, it started after 2 seconds. Amazing, my ultra can only do that if it's wired.
Honestly I’ve always used the Ethernet adapter Google sells when I’ve installed and used my Chromecasts over the years. I’ve been forced to use the built in wireless on my Chromecast w/ GTV since for some weird reason the adapter is sold out until the end of February and I’ve been impressed by the wireless performance. I’m still gonna use the Ethernet adapter when it finally arrives but it’s good to know I have a backup option.
It be great if the chromecast connection remained stable.