At the beginning of this week, Google Play announced through the official Android blog that Google Play would get a new set of more consistent icons. That includes the main Google Play icon, which has been updated and simplified based on Google's new corporate colours. The five different content apps are linked together by using Goggle Play's triangle shape, through which a relevant icon pops up.
The original Google Play logo was introduced in 2012, but had its lettering updated last autumn to match Google's new corporate logo.
An animated GIF with the new logos: