Seems weird to promote a (ok, not great) tablet by promoting how it works with Google Play. I've heard of Google Play, but rarely used it (except to download android apps). I certainly wouldn't consider "access to the huge Google Play library" to be a compelling advantage for a new piece of hardware.
Sell one thing at a time, don't try to sell a new tablet AND an as-yet-unsuccessful content platform at the same time, I think.