You can call it going downhill if you want. I call it the natural lifespan of a console gaming system. How long do you expect one to last? It's been 4 years, it makes sense that it might be slowing down. Of course there is Sony's habit of slow starts and strong finishes. Ps2 to this day is still the best selling system ever, probably because 10 years later, we still see new releases, and Ps3 has a lot of titles on the horizon. A rare exception, most consoles don't last half as long. In the end though, it's a good strategy if you can pull it off.