Valve Software released the Lost Coast update for Half-Life 2 that showcases HDR technology. The last time a technology impressed me for PC gaming was when FSAA and anistropic filtering cleaned up the image in our games. Now HDR promises to render realistic light in the environment, even stimulating how your eyes adjust in dark and bright areas. The future of PC gaming looks bright, literally!
More screenshots can be seen in the Games category on my Flickr page.