Samsung's new Web-connected TV and LG's Smart TV platforms can stream video from a computer or from a few smartphone models using a protocol called DLNA. Setup isn't a cakewalk.
Of course, when we actually saw Open webOS 1.0 it was already stretching to fill the space of an HP TouchSmart computer screen (project architect Steve Winston specifically mentioned hotel kiosks as a possibility, a market LG is all over) so it makes sense that larger displays have been a target.