Google regularly conducts server-side tests – showing new features and UI changes to only a handful of users at a time. Unfortunately, sometimes these have adverse affects on users. In this case, Google has broken the Play Store and Google Now for some users, as a result of two independent server-side tests.
The Play Store test, according to one report on the Google Play Help Forum, removes everything from the app’s home page.
Server-side tests have broken Google Now and the Play Store for some users was written by the awesome team at Android Police.