•  Martin
•   SEO Reviews
• on Apr, 03, 2014
•  No Comments.

The Incredible Impact of Knowledge Graph Cards on Google Glass Search …
You can read my post to learn about what's possible, and how far Google can take this, but in-serp hover cards could eventually include ecommerce cards, tutorial cards, product cards, review cards, download cards, registration cards, and more.
Read more on Glass Almanac