responsive email design

Great examples of responsive email design in this Econsultancy article.
It covers tons of (B2C) categories: Dominos, Expedia, Joy the store, Mulberry, Playstation.

tech definition: mosaics

Mosaics are complex HTML tables that impersonate images.

How can a table "impersonate" an image? The HTML table has so many rows and columns, each cell having a background color, that it can really look like an image. The benefit? They can be dynamic, updating data and also changing shape/size based upon the display space.  Images are static.  Great tool for email.
This is RESPONSIVE DESIGN.