It’s nice to know that what happens in Vegas stays there. But with Microsoft’s announced departure from the Consumer Electronics Show, there will be fewer secrets in Glitter Gulch. Or not. Steve Ballmer’s opening-day keynote last week apparently conjured up a little déjà vu , with many of his product announcements having been heard before – more than once. There is even some speculation in the press and blogosphere that Microsoft’s decision to exit may not have been entirely its own. What is interesting, though, is Microsoft’s official explanation for ending its starring role.