So you are looking for a device that contains a laptop body, screen, keyboard, touchpad, speakers, battery, battery charger, RF antennas, and enough processing power to decode and display the video stream arriving over radio?

My guess is that this would cost at least 80% of a similar quality laptop that also includes "computer parts" and works as an actual computer. Hell, the current HDMI video streaming dongles like Chromecast have more processing power built in than my first actual laptop.