JBL’s Google-powered smart display, link view, launches in September 2108. Other manufacturers, such as Sony, Lenovo, JBL (from Samsung) and LG, have already launched smart speakers with screen based on Google's Smart Display platform.
Google own smart diplays
Google itself currently has not yet smart speakers with a screen. But according to us this will not take long when you look at there introduction video, Your Google Assistant, coming soon to smart displays