"PCs are here to stay"
I don't think so. The pandemic has just given them a booster shot.
Then again, that depends on the definition of a PC. I'm old school ; to me, a PC is a large box - not too noisy - connected to two very large screens, with a keyboard and wireless mouse on a desk, along with a comfortable chair to sit in and enjoy the power. A PC is the most powerful computer there is, because it has the best heat evacuation ability, so its components can be ramped up.
Yet, the article cites Lenovo. AFAIK, Lenovo makes laptops, not PCs. Okay, the laptop is the modern computer, so in that respect, yes, PCs are here to stay - but nobody has ever said the contrary. Laptops are indeed here to stay, and some models desperately try to replicate the power of an actual PC.
Wouldn't want one of those on my lap, though.
So yes, laptops are the future of computing for Joe Public. True PCs, however, will remain the future of those who need the power that a tower can provide and do not need the mobility that a laptop ensures.
And if you need more than two screens, there is no laptop that can suit you.