Version 3.10.9 of the Google Play app is pushing out to phones tonight, but there aren't any major changes. In fact, a cursory glance shows it as basically the same as the 4.2 Google apps version except that now you can delete items in your Wishist and you get a new screen when apps are installing. More than likely there are more behind-the-scenes changes as well.
The apk is floating around in the usual spots and will install right over your existing Play Store app. Or you can just wait it out and you should see it "soon". Hit the break to see what it all looks like.