Google's new Stadia controller might be the only thing you'd want to buy to play games on Google's Stadia game platform.
That's because the Stadia controller connects directly to your WiFi network instead of connecting to a computer, smartphone, tablet, or even TV. By connecting directly to your WiFi network, Google's Stadia controller communicated directly with Google's Stadia servers to reduce input lag and latency. That means less time between when you press a button and see the resulting action happen on the screen.
If you want to use your existing controllers, you'll need to connect them with a wired USB connection to whatever device you want to play on. That'll work on computers and possibly on tablets and smartphones, but few TVs, if any, support wired controllers.
Unfortunately, Google didn't announce a price tag for its new Stadia controller.