"Imagine a unified platform -- one console for all gamers -- that would bring a massive paradigm shift to the games industry, where games would become better in quality, cheaper, and more widely available. Sound good? It can happen. Better yet, it's inevitable. It will happen". - Dennis Dyack, Silicon Knights

Dennis goes on a lot more about this very subject here. I do think it is a great idea, but the video game industry is full of such big egos that I don't know that it could truly happen.