Of course PC types are going to be talking about this being old tech. The problem with that is that this will be the first time a system is built around a SSD as a standard feature. Even on PC, a SSD isn't going to give you anything close to a 90% decrease in load times.
PC tech is irrelevant, simple fact of the matter is devs design their games around the dominant console’s tech. As Cerny explained the increased rendering speed allowed by the custom SSD solution will allow for fundamental changes in game design.