Nah, as the old wood rots away new trees grow.
But there are not really any new major publishers. If I had to name the major publishers left: Nintendo, Sony, Microsoft, Square Enix, Sega Sammy, Namco Bandai, Activision Blizzard, Tecmo Koei, Disney Interactive, Konami, THQ, Ubisoft, Midway (for now), Capcom, Atari, Take-Two Interactive, Electronic Arts. I think that's it, pretty much everyone else would be mid-sized or small publisher. That is still more than the film industry and music industry though, both of which only have about 6 or 7 major publishers.