Aaron Bradley posted on Google+ that the product schema page has added that it can be used not just in the web results but also in Google image search results.

I checked the old and new page and he is indeed right. Google added language to specify that product schema markup can be used in image search now. Here is the new language:

To show your product information in the rich image viewer: Include the name, image, price, and priceCurrency properties. Alternatively, instead of price and priceCurrency, you can include any four properties and exclude price.

You can actually bring them up on your mobile searches, in image search. Kenichi Suzuki spotted it and I can replicate. When you click on an image result, it can show product data. Here is a screen shot:

Forum discussion at Google+.