I wouldn't mind at all if all the listed companies completely disappeared.
Given that those companies make up most of the 3rd parties (certainly the major players, anyway), that's a foolish sentiment. As I stated in another topic, there needs to be healthy competition in the industry to keep it fresh and interesting.
Fresh and interesting? Super Mario Galaxy, Wii Sports Resort, No More Heroes.
Fresh and interesting? Bioshock, it's sequal, Team Fortress 2, Half Life 2.
Fresh and interesting? Indie games, Wii Ware, DSiWare, Xbox Live Arcade games (some of them)
What a majority of third parties find fresh and interesting, including the fan bases that dump their cash on them?
HD grafiks with bloom lighting, brown shading, REALISM, FPS, overhype, and my ever favorite plot device: nanomachines.