The official android developers blog, has released the latest version of Google Play Services for Android devices. A number of new features have been added to give you better user experience with new features and bug fixes. The major upgrade and features includes; a major enhancement to Maps with the introduction of Street View, as well as new features in Location, Games Services, Mobile Ads, and Wallet API.
If you want to know further about the new features that have been released with new and latest version of Google Play Services, I have already given a link to the official blog, where everything has been clearly explained. To download the latest version of Google Play Store, download link is given below. The credit for the Play Store apk goes to the XDA developer community, who has mirrored the apk file.