I currently have a Fire TV Stick 4k and a Chromecast Ultra. The Chromecast Ultra came with my Stadia setup and that's all I really use it for (apart from the occasions where I have issues with my Fire TV Stick). I'd like to get and Android TV device to replace both devices for when Stadia is supported.
I was going to pick up the Chromecast with Google TV for free-ish with the Netflix deal, but I saw that the Shield TV has "AI Upscaling" to 4k. Is it a feature that makes the Shield worth the cost? I have a few streaming services that I'm not going to pay for upgrading to 4k.
I think it's significantly better than the upscaling I've seen on any TV. It's particularly great for animation.