Windows is suffering the same thing with less demand for x86 PCs.
True, but the PC has seen a bit of a renaissance lately with gamers and hardware enthusiasts thanks in part to some companies really stepping up to the plate.
Nvidia, for example. They've hit the ball out of the park the past couple of years, but this year they really nailed it with their super efficient Maxwell cards. The GTX 970 is a 4 teraflop graphics card for under $350 that runs cooler and uses less power than slower more expensive cards from just a year ago. That's nuts. Drop one into virtually any modern PC with the correct PSU, and you can play BF4 in 1080p at >100 fps for less than the price of a console.
This renaissance leads to another in the monitor space with the 144Hz revolution. Then you combine the general upgradeability of the PC with the falling prices of other components like SSDs, and so now even a 4 year old Sandy Bridge i5 or i7 PC has tremendous value to someone.