I'm guessing that when you said that the presenter will be mobile in the room you meant that the projector could be set up anywhere in a room. Well, wireless video for HD sources is pretty poor right now. Wireless HDMI exists, but cannot do full HD as the bandwidth just isn't there yet. However, the technology does exist for what you propose - presentations and some video. I'm sure others use the tech as well, but Epson seems to be one of them. Here is some info for you: http://www.epson.ca/cgi-bin/ceStore/Landing/wpBusHome.jsp?BV_UseBVCookie=yes Hope that helps! I should add I've never tried using one of these wireless projectors, and I think that given the choice I'd rather just hardwire in a "station" for a projector to connect to so there is one less thing to set up prior to a presentation.