Four years ago today, the Apple App Store launched, changing the face of software distribution. Anyone from a curious 13-year old to a grizzled developer who lived through learning Pascal can release an app and hope to strike gold. Even Apple’s own operating systems are distributed with this model now. I distinctly remember my first thoughts on the matter. I was standing in line for the iPhone 3G, not for myself, but for a coworker who I had convinced to upgrade (so I could get his original...