Need to get a closer look at something? The Play Store on Android will now oblige with pinch-zoom on screenshots, which let's be honest, it should have had ages ago. However, this was just snuck in recently, possibly as a server-side switch.
We've seen this on 7.0.x, 7.1.x, and 6.9.x variants of the Play Store client. We've been hearing intermittently from people who say they have the ability to zoom on Play Store screenshots, but it wasn't a widely available feature until recently. Now, it seems to work for everyone. My money is on a server-side change.
You can zoom in a fair way, but it pulls back out a little when you release. On the plus side, you don't have to zoom out to swipe to the next screenshot. It's the little things.