Christopher Mims for Quartz:
Apple’s Mac desktops and laptops may still count for a fraction of the global market for PCs, but when you tally up all the computers (iPhones, iPads, etc.) on which people actually get things done, the number of computers sold by Apple exceeds the number of Windows-based PCs shipped worldwide in the fourth quarter of 2013.
When you realize that an iPhone 5s in 2014 has approximately the same specs (hard drive space, memory, speed) as an iMac from 2004, I don’t think it’s cheating at all to count iPhones and iPads as “PCs”. Hell, even people from Microsoft have said the tablet is a PC.