IGN - With Steam occupying the top spot in the PC digital distribution business, the way Valve decides to develop its service over the coming years will have a significant effect on how we purchase and play PC games. One competitor, OnLive, offers a different distribution method than Valve. Instead of downloading games to your hard drive and relying on your local hardware to power the experience, OnLive's service takes care of all that on its server clusters. You simply log into the service, click on the game you want to play, and seconds later are dropped into the experience. That means you can play something like Deus Ex: Human Revolution on a poorly equipped PC.