Welcome to our new “Best of the Web” daily feature, in which we summarise the big tech stories from around the world. Videogames are big business. If you were in any doubt of that, consider that the Christmas season’s big blockbuster, Call of Duty: Modern Warfare 2, has just exceeded US$1bn in sales. It’s estimated that the game has sold more than 15m units since launch on 10 November 2009