I guess he means Unity which uses Mono. But there are others as well like MonoGame which is the de facto XNA successor (and its natural evolution) and Playstati

I guess he means Unity which uses Mono. But there are others as well like MonoGame which is the de facto XNA successor (and its natural evolution) and Playstation Mobile that uses Mono. edit: Would be quite awesome if they somehow incorporated the Mono runtime on the new Playstation as well for indie development. Here's for wishful thinking!