Every single generation since the original XBox has been the same thing when it comes to this. This gen is not suddenly going to be different. Give it a year or two, the expensive pcs of today will be besting the ps4. Exactly the same arguments are had as well. Its amusing.
It's not suddenly. The PS One and PS2 came with their own proprietary chipsets and developer tools. The XB at least had the benefit of their custom Microsoft tools that benefited the ports that went to the 360 compared to the much more esoteric PS3's Cell Processor. Gradually overtime, the idea that using off-the-shelf parts (Intel or AMD, as opposed to the PowerPC from IBM) and following unified RAM design and moving to the AMD APU architecture will allow for more longevity from the consoles. So, that "besting" will be less than previous generations just based on standardizing hardware alone.
Another factor is how much will this affect how many game developers focus on the console first vs the PC. Even last gen PC gamers complained that their port was always neglected compared to the consoles. Will that improve knowing now that the PS4 (and to some extent the XB1) and its AMD developer tools have been built from the ground-up with the developers wants/needs in mind?
So, when you say, "give it a year or two" I'll say, ok. The gap will widen slower. But be aware that this also comes with the added benefit to new developer tools and ones familiarity with the single platform AMD console hardware compared to the ever changing sea of Nvidia and AMD drivers, operating systems, and patches you'd find in the Windows 7/8 ecosystem. It's harder to please all PC gamers. It's going to be easier to do that with console gamers now that x86_64 standards have become more influential.