Tekken creator Katsuhiro Harada recently sat down for an interview with Kotaku. In it he says:
Harada is candid, perhaps unintentionally, about Tekken 6's substandard netcode. "Fighting games aren't really tailored to online play at the moment because of the lag," he said. "But as technology evolves and the infrastructure gets better, and you have much less latency, perhaps that kind of participation - whether that be avatars watching or whatever - can be recreated."
So the technology's to blame? Well, Mr. Harada, why didn't you say as much in your Game Pro interview back in April?