I am a tech novice so have what probably is a simple question. I am looking to conserve space in an office nook in my home. The small room needs to multi-function as den and extra TV lounge space. The room is served as the remote TV location on my Dish dual tuner. Would it be possible (or convenient) to have my 20" HD TV also function as the monitor for my desktop computer? Possible? Impossible? Thanks!