PCs aren't dead in their niche
Traditional PC makers are in a bad spot. Most people are fine with tablets and phones for content consumption now, and PCs are lasting longer and longer these days because there's just so much processing power and speed with SSDs, etc.
That doesn't mean there is not a strong market for PCs within their segment. If manufacturers would stop focusing on trying to wring out margin on $300 garbage consumer PCs sold at Best Buy, they'd find there's money to be made at the high end. I'm personally considering replacing my home workstation after a long stretch, and I'm certainly willing to spend money on quality systems. Lenovo makes a nice line of workstations, along with capable midrange corporate PCs, but they also make a line of consumer junk.
These manufacturers would be fine if they abandoned the consumer market and aimed a little higher.