While movie studios often sell a movie as the singular vision of a single auteur, games or more often sold as products than statements. With games, "it was far simpler to associate that content with a genre, or better yet, a franchise brand, than it was to associate it with a personality," as Dugan puts it.
Perhaps this is for the best. After all, most modern games are produced by a large group of people, not just a celebrity designer that can serve as a public face for the project. Even this is changing, though, with high profile, independent projects like flOw and Super Columbine Massacre RPG being closely associated with a single designer (Jenova Chen and Danny Ledonne, respectively). In an internet world where anyone can easily make and distribute a game, literally anyone can be a celebrity designer.
Personally, we just hope this growing trend of attention for the people behind the games doesn't grow into outright celebrity worship. The line between respect for a designer's vision and Us Weekly style obsession with everything they do isn't as thick as you might think.