Dell is looking to expand the functionality of its Venue 7 and Venue 8 with the Dell Cast, an $80 wireless dongle that plugs into a TV, turning those Android tablets into fully functional desktops. The Dell Cast dongle is about the length of your thumb, and no larger than devices such as the Chromecast. On one end is a male HDMI plug to connect the Dell Cast to a TV or monitor, and on the other side is a full-size USB port, which lets you attach a peripheral such as a mouse or keyboard.