Did you read it? Google has launched a full featured mobile client for Google Play Store. This is not a mobile client but is a mobile view which works on any mobile user agent on a web browser. This mobile web version has got everything the web version has including hardware which is missing on the mobile app.
The design is clean, minimal and flat. It has a drawer menu which is recently known not to last long after Google killed it with the recent update on Google+. You can now buy any Nexus device on a Nexus friendly web layout the only difference being that it is now responsive.