erm guys, there's a difference between matured and perfected especially when talking about products, boot times and power consumption are performance characteristics, and while they would greatly assist with the maturity of a product their absence does not preclude a product from maturing.
a product matures when it is able to realize and be utilized beyond it's initial potential, seeing as what PC of today are used for as opposed to 20 years ago, i would say the platform has matured nicely, that is not to say that we do not have room for improvements, there's always room for improvements.
Right now what is required is some radical innovation and some creative thinking to change the way we utilize our PCs
dont get me wrong, i still think his blow smoke out his backside about how GPU will be a game changer, but his assertion that the PC has matured would not be far wrong