The patent illustration also suggests that each player who also have their own audio-feed. You would still need a "3D" TV, but it's important to remember that essentially 3D TV's are just sets with 120Hz refresh rates - all televisions will eventually do this anyway. Thanks to Kotaku for the heads-up!
Sony Files Two Patents Related to Stereoscopic Screen Sharing [brokemycontroller.com]
Edit: And the audio would be easy...just route one track via the front left/front right and the other through rear left/rear right channels.