Google unveiled Stadia, a service that will let people play video games without the need for dedicated consoles or high-end computers. Instead, gamers will be to play on standard laptops, tablets or phones, with all the heavyweight processing performed on Google’s servers.The platform will let users immediately play any game that is available on the service, without the need to purchase it individually or download it to tire video. “Stadia offers instant access to play,” said Google’s Phil Harrison in an announcement at the Game Developers Conference in San Francisco.Stadia is a cloud gaming service, meaning that processing and graphics rendering will be performed at Google data centres. As a player moves around in a game, video of the gameplay will be streamed to their device. Providing the internet connection is good enough, this will happen seamlessly.Stadia can be used with existing USB controllers, but Google also unveiled a purpose-built controller, which connects via Wi-Fi to the game in the cloud, including a button that allows them to share video of their gameplay to YouTube.