Where do you think PC gaming is headed next?

For years now, PC gaming has been at the forefront of gaming technology, be it on the software or hardware side. The past few years have seen innovations on the hardware side start moving to other platforms (motion sensing, touch), and with recent releases such as Assassin's Creed 3 being firstly released for consoles and Unfinished Swan trying something totally new with game concepts, I was wondering where you think the future of PC gaming lies? I think back to when the original Half-Life introduced us to such concepts as scripted events and an AI system that wasn't just "everything shoot at player"; to Portal bringing us, well, portals; to the modding community, past technologies like HDR debuted in Lost Coast...

In short, what new gaming concepts, programming features or hardware innovations do you think will become the cornerstones of PC gaming in the next 5 years?