I did saw this announcement that this is the first video game console from Google themselves called the Google Stadia. It can connect to any multiple devices including computers, phones, and tablets. It looks like you don't need to unplug your input connection from the TV incase if you wanted to play on other devices. It's has a streaming service to play games.
By the way, the Google Stadia can run up to 8K, the first video game console with 8K resolutions. I did saw people saying this is looking like it's going to kill video game consoles, but I don't know what to think about this? I noticed the controller kinda resembles to the Nintendo Switch Pro Controller.
Here's the demo to show how the Google Stadia works: