GeForce Now gives you a Windows box with Steam on it, and you log into your Steam account on it. They pair it with a super fast cache of the Steam Depot so your

GeForce Now gives you a Windows box with Steam on it, and you log into your Steam account on it. They pair it with a super fast cache of the Steam Depot so your first install is speedy. That way, there's no integration necessary, and Nvidia doesn't have to reinvent the achievement/launcher/licensing wheel.