Please add the functionality to cast via a PC. Basically, anyone without a mobile device capable of doing this, is left out. This is so frustrating. I can cast the Slingplayer page but because the slingplayer for web creates another window, it will not cast. So either the slingplayer for web and/or the slingplayer desktop need to have the cast functionality added to them. This seems like basic functionality that would be included. I have noticed that others have asked for this as well but their posts have gone unanswered.