I am mind blown!!! I saw that the BlackBerry Z10 had screen sharing during chat with BBM and thought that could be soooooo useful for me in a smartphone but haven't seen anyone else do it. Then, I saw this video from Samsung Mobile: http://www.youtube.com/watch?feature=player_detailpage&v=2LHv1FPd1Ec&t=200s It shows that the ChatOn app in the Samsung Galaxy S4 has built in screensharing!!!! This is a hidden gem that I have not read in any reviews or press releases. I had the ChatOn app on my Galaxy Note 2 but deleted it since I already used another messaging app. I'm going to have to reinstall it and see if the current version supports the screen sharing or if I will have to wait for the Galaxy S4 to launch first before getting the app update. I think Samsung has done a really good job with the improvements in the Galaxy S4 and am finding these hidden features as I read more and more. I am also liking the Galaxy S4 more and more as I get to know it. Can't wait for the Note 3!