Sonic Adventure was made, what? 8 years ago? I hardly count that as what we have "today". What we have "today" is Shadow, Rush, and Advance 3. Don't get me wrong, I love the music in Rush. Demos are also used to see if the gameplay is good. The gameplay could have been drastically changed for all we know. While gameplay is important, the other parts of the game are equally important in my eyes. Maybe some time, but it's not on the top of my list.