I would love to get hold of this new audio gear. The HS1A will loose the Dolby effect (which worked quite well to be honest), but a direct feed from a decent sound card will probably more than compensate... musically anyway. As for games, I don't think the software based up-scaling of the soundcard will quite match the tuning that Corsair put into the USB based HS1... I would love to test them with an Amp - shame I lack a headphone amp, lol.
I do find it strange that Corsair are also trying this 'Link' thing again, after NVIDIA tried and failed... pretty much all it's partners stopped advertising it after a month or so, even Thermaltake - which had a complete ecosystem, PSU, Chassis, Fans, Heatsinks, Water loops and controllers.