This week’s E3 Media and Business Summit in Los Angeles gave each major console maker — Sony, Microsoft and Nintendo — the chance to showcase the future of their platforms. Microsoft added social functions and new entertainment options to the Xbox 360, Sony trumpeted a video store and an upcoming price cut for the PlayStation 3, and Nintendo showed gamers glimpses of a new controller add-on and upcoming games like “Wii Sports Resort.” However, if any of the Big 3 could be said to have “won” E3 this year, then Microsoft takes the top prize, according Yankee Group’s Mike Goodman.