Since Stadia is an early access game streaming platform, Google is still working on bringing big things to the table. You can expect wireless Stadia controller support for many more devices, high-quality 4K gaming on all Chrome web browsers, and more Google Assistant features. They also managed to silently sneak in a way to keep track of your Stadia gaming sessions too, which is pretty handy.
Although not quite as common today with the always-connected world we live in, you still might be having bandwidth wars in your home right now. If the internet connection in your area is mediocre, you know the feeling well. Google Stadia recommends having a 25 Mbps connection for playing in 4K, so you can expect to need at least that much to maintain a smooth, high-quality gaming session.
With the early launch of Google Stadia for cloud-based gaming, there was bound to be a slight learning curve for most people. Many didn't realize that the average TV is not suitable for gaming by default. This is why there is a separate game mode you must use when playing on the big screen. Luckily, your Chromecast Ultra can actually take care of this for you automatically.
Stadia is a lot like an Xbox or PS4, except there's no console — the games just stream from Google's servers to your phone, computer, or TV. But Stadia is limited to Pixel phones for right now, and when Google does expand support, it will still only be for select phones. Thankfully, there's a workaround for that if you're rooted.