I don't mind DD, but there still has to be a physical thing to download it into and actually play it. Plus to keep costs down you'd need a unified platform, and a standard input... I have no problem with a one-console-future where an international committee meets to create the unified standard, and then manufacturers compete for non-essential perks - but pragmatically there's always (with current technology) going to be a need for a standard box. Physical media I see as gone, but not until solid-state is more prevalent and high-speed communication perfected.