outsold PCs for the first time, 100.9 million units to 92.1 million units. The PC will never catch up... at least not unless they start including tablet numbers in the PC totals.
For game developers, this is a good thing. It's not like PCs have stopped selling, but smartphone sales are growing rapidly. Smartphones offer a reasonable gaming environment that continues to get better over time, and most importantly it doesn't require a huge startup cost in development hardware. Or navigating a big bureaucracy to get products published. The biggest hurdle is marketing, and at least that's all under the control of the developer.