Google is combining Android Market, Google Music and the Google eBookstore into one product called Google Play. Given that Google Play has replaced Android Market, users of iOS may be wondering if they can use it. The answer is yes. Kind of.
Don't expect to start using Android apps on your iPhone or iPad, but users of such devices can still take advantage of Google Play to some extent. Google had the following to say in its help center:
Google Play is available on any computer with a modern browser at play.google.com. On the web, you can browse and buy books, movies and music. You can read books on the Google Play web reader, listen to music on your computer or watch movies online. Your digital content is all stored in the cloud, so you can access from anywhere using your Google Account.
We’ve also created ways to experience your music and books on other platforms such as the Google Books iOS app.
There is also a Google Music app for iOS, so I assume that will update to Google Play as well. Google Music on the web has already updated.
You can go to play.google.com on your iOS device, and you can try to download an Android app, but it will just tel you it doesn't have an Android device associated with the account. That is assuming you don't have a separate Android device associated.
If you are using Android, here's more on updating to Google Play.