Preorderable Downloads - The Future of Games

Microsoft says the future media will be digital. Sony more or less agrees with this theory, as seen in the PSPGo. Obviously, the time is not right for a strictly digital system. But then again, it's not really fair to say that when there is no incentive other than ease of doing so. Does the Go have the same library as the PSP 1000 - 3000? No, it falls short (lesser known "must have" titles for