Thirty million over nearly four years is decent, but there is something else worth paying attention to here. Online content has clearly become a huge part of console gaming, so much so that the online experience is a huge part of owning a console these days. The fact that constant software updates, and even some minor hardware refreshes, are now a reality of modern console development should also play a part in sales. After all, there's a huge difference in buying a four year old console and buying a “current-gen” gaming rig.
Many gamers don't have computers which last four years, so seeing strong staying power in consoles is encouraging. For those of you who own consoles: Did the ability for the console to remain “current” play a part in your decision to buy it?