Input/Output doesn't "buzz" like teraflops do. But, of course I agree with you.
That said, PC, itself, needs to take better advantage of the NVMe. Yes, so far, I've noticed a small upgrade in speed but nothing like what I saw when I went from my 7200 RPM HDD to a SATA SSD. For this coming gen to truly be a difference on the platform, games are going to have to start taking advantage of those drives. Seeing as that's what I expect, I'm not too frayed, but until that happens, only the consoles will really be able to flex an NVMe.
But, that just goes right back to your point ~ people should really look closer at these types of changes over just your typical graphical upgrades.