As Neji said a good time ago, performance is an important key to consider in this game. Meaning that coding for the sake of coding want accomplish anything here, because if it drags down the performance then we all will be complaining. On top of that, we need to seriously think about other people that might not have computers with awesome graphics. The way it is now, we have it open to everyone (DSL(like me), Cable, and Dial-up).
To be honest, I was extremely happy with the pictures that I saw of all the masters I had to fight, level 1 through level 15. This isn't youtube and this site hasn't been bought out by corporate sponsors. In order to get all that 3-D stuff, it would mean that you would be paying a fee everytime you play the game.