From the announcement:
At 8 inches tall the Imperial Knight is a towering war engine. Crafted in the Dark Age of Technology and resplendent with gothic details it presents a unique silhouette both in a display cabinet and on the battlefield. Fighting alongside armies of the Imperium, most Imperial Knights are part of a Knightly House. They are affiliated with either the Imperium or the Adeptus Mechanicus. Some Imperial Knights choose to forsake all ties to a noble house. Known as Freeblades, they are masters of their own destiny.