Oh yeah! We had a subwoofer design that did that. But we never brought it to market because you needed a lot of real estate or you'd quickly run out of room. They did present a very dynamic sound stage however. The music just seemed to flow around the room.
We recently adopted a new philosophy on this kind of thing. We have some prototype subs that actually stay put, but the whole house vibrates and moves around the neighborhood. Really cool...
- Jim