Paul Bettany is Jarvis/The Vison. James Spader is Ultron in the next Avengers movie. [http://www.imdb.com/title/tt2395427/]
Sorry but it's a pretty important distinction.
Edit: re multiplayer games on different consoles/platforms. The server talking to a client is not the same thing as the game running on a client, the server is totally platform agnostic, the client just has to talk to the server in a certain way, LIKE THE INTERNET. ahem, sorry. basically the server is not running the game, it's facilitating the players to see each other. It's a pure business decision to not allow cross platform.