Sony has really tried to improve the gaming experience with the PS3 through new and innovative technologies, but unfortunately this mindset has led to a decrease in the number of quality games. That is just one of the things that's prevented the mass adoption everyone was expecting for Sony's latest console.
Quite evidently, the PS3 is the most "open" console. Users are not bound to the very rigid set of specifications mandated by the Xbox 360 and Wii hardware. This should make it an appealing target for developers and consumers, but it's not. Unfortunately, in trying to make the actual specs of the system as cool as possible, Sony seems to have forgotten that it still needs quality games.