Yes.  WiMAX is designed to support high quality video as a basic aspect of the technology.  However, it should be noted that true IPTV and/or High Definition TV (HDTV0 is not widely thought to be a product that broadband wireless is completely ready for due to bandwidth limitations in delivering signal to many users simultaneously.  However, recent announced advances by some companies make claims that full High Definition TV could be achieved with approximately 2.4 Mbps of capacity, which should be well within the scope of Mobile WiMAX.  These solutions will take time to mature.  More likely limiting factors, especially for handheld devices, would include storage capacity, battery life and display technology.