Playstation 3 headset utilizing 7.1 surround?

Let's just think about that for a second.

Speaker notation for surround sound systems is the number of satellite speakers and subs. So a 5.1 system has 5 satellite speakers (3 front, 2 rear) and a sub (.1).

Headphones have two speakers, left and right. It's theoretically possible they could build in a tiny little sub to each speaker, but you're still only looking at a 2.2 setup max. You can't have true 5.1 or 7.1 surround sound with headphones. What you can get is a clever use of psychoacoustics to create the illusion of surround sound with headphones. It won't ever truly be the same, especially with things like vocals which usually come from the front center channel.

But you should check with Logitech, since they make a lot of game console accessories as well. That set of headphones may well work with the PS3 just fine. You can also check with Sony, who likely has a list of every licensed accessory maker and the accessories they make.