If you fire up your Google Play app this morning and things look a little more awesome, don't be alarmed. It's just that you're now rocking the same version as the folks running Jelly Bean ROMs. And that means, along with a spruced-up layout, you also should have access to Magazines (if you didn't already).
You don't have to do anything to get the update -- it'll push out to your phone in due time. So sit back, relax and marvel at how far we've come since the old days of the Android Market.
More: Android Forums; thanks, @armaniblake!