In the old days of gaming as in about 8 years ago, the summer in the industry was dominated by one thing. Not games, but E3, the Electronic Entertainment Expo, created by the ESA (Electronic Software Association). Over the years the event run, it got bigger and bigger with more fanboys than actual journalists seeing what they wanted to see. Magazines were weighed down with everything E3, from the build up, the actual event itself and the awards given afterwards.
Now, beside the dispute that certain jouno's enjoyed meeting the booth babes 'too much', E3 allowed all members of the ESA (yes members, for those that don't know companies have to pay to join the ESA) to showcase and demo their new projects and make all those announcements they were holding back till they enough of a hype.
However, a different trait has become prevalent, with developers and companies generally holding slightly smaller, but more focused events at their own venue. Commonly called 'Gamer Days' or 'Ubidays' if you're one company that just love to be different. These often allow developers to showcase all their new releases in a larger un-constricted environment. This was beginning to be the case at the new re-structured E3, which as well as having the traditional large hanger area, had developers in smaller hotel rooms, where they could show their games to journalists easier than the hanger.
Obviously, the old E3, which was basically filled with sweaty fanboys needed to change, but it seems that the ESA has lost the support of a lot of the industry. Activision (the worlds largest publisher) recently announced it was pulling out of the ESA thus E3, with smaller developers such as Lucasarts following suits. This is quite worrying for the ESA, who are funded by these companies, amongst other things. It appears to be to do with a dispute with the president of the ESA, Mike Gallagher, basically over his leadership and decisions.
From an outsider, it appears a large shift in the industry is occurring, and as the large publishers get larger and the small ones vanish, its only a matter of time before associations are simply not needed.