The demise of the PC has been called for for at least 20 years now. I remember similar headlines in the early nineties, claiming that home computer gaming industry would be beaten to pulp by japanese consoles like the Sega Genesis or the Super Famicom, mainly because it would be impossible to pirate a cartridge.
Nowadays, we have a massive user base connected to a cheap digital distribution network, the Internet, with no vendor lock on. You need the right technology and strong commitment to take advantage of such a powerful platform: that's what Valve did with Steam and, seven years later, it's still a great success.