Today you can get a tiny 4cyl that produces 300 horsepower and can get 35 mpg on the highway. 10 years ago it was unfathomable. But billions and billions of R&D plus government regulations sure has a way of sparking innovation.
What vehicle has 300 HP and gets 35 mpg highway?
Also, I think a lot of the reason we're seeing decline in new PC sales is that old PC's are perfectly fine; second hand sales (does anyone track them?) are growing quite a bit. A midrange and above SandyBridge era system from 8 years ago (with an SSD) is perfectly fine for casual use.
The trend is that there is a market schism. We have premium and value, with mainstream dying out. Either people want a cheap throw-away (growth here) or something stylish and/or powerful (even more growth here). That's why we see ASP's of cpu's going up, despite their volume going down (the PC group revenue actually increased 2% YoY for Q1-2016 despite the volume decrease).
Personally, I see the consumer CPU line-up in general as a huge convulated mess. We have Atom x3/5/7, Celeron/Pentium (which are Atom for mobile/desktop or Core for desktop), Core m3/5/7 series, and Core i3/5/7 series. They just need to axe Celeron/Pentium altogether.
