Can the Big Three game companies stay relevant in the age of “Angry Birds”? At a time when cheap, high-quality phone games are making accidental gamers of millions, console makers Nintendo, Sony and Microsoft have gathered at the annual E3 conference, known as the Cannes of video games, this week in Los Angeles. The bold new ideas they offered track dual themes: balancing convenience against experiences no other company can deliver.

Nintendo unveils Wii U tablet