Unless your computer is 20 years old or you're playing one of the few games that actually require a fairly up-to-date computer, you literally can just pop a game in, let it install, and play. At worst, you have to manually select the correct resolution.
Don't forget trying to run older games like Morrowind, new games on old engines like Forsaken World and Grim Dawn, and new games developed to run on a single core system for some reason like the Torchlight games. You can feasibly have a multi-core CPU decent enough to play most modern titles at at least Medium settings that will chug on these single-core limited titles due purely to having low per core performance. Grim Dawn, for example, doesn't actually look significantly better than the Van Helsing games (freely admitting I haven't touched the first one in months though) but chugs along at 30 FPS in many outdoor areas while Van Helsing regularly ran at 60 FPS on my machine.
It does remain as fact, however, that if you have something equal to or better than a Phenom II quad-core CPU running at around 3 GHz along with, again equal to or better than, an HD6870 graphics card the number of games that will significantly, and legitimately (legitimately being defined as the game supports multi-core CPUs), tank on your system probably won't get into the triple digits, even with settings at or near maximum.
Logic is the antithesis of faith, else why is it that faith defies logic while logic denies faith?
Point is though that the 30fps area is in fact playable, and quite achievable in most games on most systems. If you're willing to deal with it on a console, you're willing to deal with it on a computer, so the only issue becomes that installation point, which is nothing.
Lock On: Flaming Cliffs 2. Lets revitalize this game eh? http://www.youtube.com/watch?v=6FUge6ghaIo&hd=1