On this week's all-star episode, we welcome columnist Kirk McElhearn, Macworld's "iTunes Guy," who will explain why he's cut back on his Facebook activities. He'll also profile iTunes 12, the OS X Yosemite-savvy version, and consider whether he should replace his relatively new Mac Pro with a 27-inch iMac with 5K Retina display. You'll also hear from cutting-edge commentator Daniel Eran Dilger, of Roughly Drafted Magazine and AppleInsider, who will bring you up to date on the platform wars. He'll cover the differing concepts of tablets from Apple and Android, Google's Android Lollipop and Microsoft's Windows 10 operating systems, and why he believes both companies are out of ideas. He'll also discuss why he believes Samsung, the largest maker of Google smartphones, wants to ditch Android.