He says, "Universal Windows apps are going to be written because you want to have those apps used on the desktop. The reason why anybody would want to write universal apps is not because of our three percent share in phones. It's because a billion consumers are going to have a Start Menu, which is going to have your app. You start the journey there and take them to multiple places. Their app can go to the phone. They can go to HoloLens. They can go to Xbox. ... And by the way, when we hook them on that, we have a phone app. This strategy is path dependent, which is a term I use that means where you start is not where you end up. And therein lies a lot of the nuance. The fundamental truth for developers is they will build if there are users. And in our case the truth is we have users on desktop."
Six console targets are planned: Wii U, PS4, Xbox One, PS Vita, 3DS, and PS3; footage of demos running on the Wii U was presented at the talk and are included in the linked article.