Android's UI as a "media consumption" device is terrible compared to what Kindle Fire and Nook have done. The average user (say your parents), aren't going to go to the Google Play Store (which is a terrible non-obvious) name to buy books, movies, apps, etc. unless you explain to them that you have to use the Play app to download content. Kindle Fire nailed the obviousness of this with the top bar being labeled with…
I tend to agree that "Play" as a brand is a terrible name, though. But then I feel that way about most marketing, and find my intuition there routinely wrong. So I won't judge.