Many people used to ask me this question, read the below article published @SignageInfo.com

TVs are designed for at home broadcasting, while digital displays are designed for narrowcasting, i.e. reaching your target audience. Internally a commercial display is different with an integrated media player and no requirement for a TV tuner. Commercial content can be displayed directly from an external media player or via memory storage devices (USB, Compact Flash, SD card). Continue reading Digital Signage – “Can’t I just use a TV?” →