Something is definitely wrong in the smartphone segment as well. When one OEM is squeezing out almost all others, and sales are split between numerous OEMs who have serious trouble with differentiation. Android isn't profitable, unless you're Google counting up ad revenue or you're a carrier gouging consumers, or Samsung... who seems to be going in a direction opposite to everyone else.
It's a mess.
Smartphones - a sick and dying industry.
PCs - a sick and dying industry.
Having only one company that makes all the profits leaving nothing for other companies to invest in making better products is a sick and dying industry.
The only reason why the cloud ecosystems are flourishing is because we've got 4 major players competing hard(Amazon, Apple, Microsoft, Google) with no one utterly dominating. That's an example of real competition with constant innovation and the consumer benefiting. Consumers do not benefit from a world where the only smartphone is an iPhone and the only PC is a Mac.
Yeah you can point to the hundred different Android phones, dozen Windows Phones and 100 different PC models you can choose from right now. But the way the industry is going with almost all the profits to Apple is that model will no longer exist. You will see Dell & HP go under, followed by Acer, Asus and so on. Lenovo might hang on for a while, but by 2020 Macs will be the only thing in town.