I firmly believe intel went from decline (which you can reverse) to terminal (which in a business sense, can be reversed, but it usually isn't) as soon as AMD was able to successfully erode some of their server business, and ARM is now doing the same.

The mountain of money for intel has always been with server chips, as its their high margin chipsets. While they make alot of money on consumer laptops and desktops, its no where near the amount of money they traditionally have made on their server oriented chipsets.

I don't think Intel is likely to come out of this state without something extremely radical happening, and every time they try to do something that could be radical it never has enough time to gestate to work, it always ends up abandoned.