Rol with only half the story...seems about right. Sony's long legs are a combination of sales AND the support of their systems which on average is ~10+ years.
With the rise of PSN, the need for Sony to buffer losses from new console releases with late push of cheap consoles and software is over (seemed pretty evident with the PS3 to PS4 transition). Having long legs for consoles was out of necessity (cost buffer for the PS2 launch and preventing greater losses from the PS3 launch) and now that they have a corrective action for that, they can just focus on the transition. The PS4 will still be supported by Sony for the next 3+ years, with major software for this year and next, even if sales don't. Contrast that to their competitors...yeah...longevity.