@ celine
I think it's more useful, albeit the graphs don't take into account crucial factors like pricepoints. IMO the breakup of consoles into generations is pretty much artificial, at least in the past the classification was based on CPU architecture, 8-bit generation, 16-bit generation and so forth. The Playstation did compete with the Snes at a time, the Nintendo Wii IMO competes more with the Slimline PS2 than it does with the PS3.