Espial (TSX:ESP) will showcase the features of its STB Client during a demonstration at the Cable Show in Washington, DC. The demonstration, based on the Comcast Reference Design Kit (RDK), will highlight a user experience on set-top boxes based on HTML5 3D capabilities.Highlights of the demo will include an HTML5 EPG, VOD wall, multiscreen place-shifting, favorites, and video and social media apps. The Espial STB Client is intended to let cable operators deliver blended Web and TV services. The company will also participate in a technology session on the Comcast RDK at Imagine Park.