You'll see that that link is a couple of years old. After assimilating the competition Craetive went on to pushing discrete multichannel sound with EAX rather than binaural 3D sound processing. (Hey, they've got speaker systems to sell...) This field have thus been pretty much stagnant ever since Aureal went belly up. Last year Creative also bought the foremost third party provider of sound algorithms to it's competitors, Sensaura, no doubt to lock it's IP up in a basement somewhere.
The article says that 3D sound sounds better with 4 or more speakers, which simply is not true. Real 3D sound would be best experienced with headphones, and unless very meticulously set up, using 4 or more speakers tend to destroy any elevation cues in the sound. While a Creative soundcard with lots of speakers is the most immersive sound you can get in a game today, it's really more 2D than it was a couple of years ago.
The reason the article make the distinction between 3D sound and Surround, is probably that the term 'surround' have previously been associated with Dolby Surround. We're really dealing with more than one concept here. You can have both static and dynamic multichannel sound, which both may or may not have 3D audio processing done to it.