You can now enable Schema.org markup on your product detail and blog post pages! The setting is placed under Admin > Config > Plug-ins > Analytics Settings.
You can use schema.org microdata on your product landing pages to help Google Shopping retrieve up-to-date information directly from your website. By using microdata with automatic item updates, you can help support a high-quality experience for users who view your ads.
Here is more info on setting up microdata for Google Shopping.