What you sound like you are describing is usually called shooting tethered .
Have a look at something like this:
http://www.jibble.org/canon-tethered-shooting/
^this might be the best option since all that is really required is the ability to get the shot onto the pc. the batch file is doing the rest.
http://www.radugrozescu.com/photo-te...-tethered.html
http://photoshopnews.com/2006/12/06/...-in-lightroom/
Mac?:
http://www.youtube.com/watch?v=_9p4LD1SqWo
BTW, your TV is probably getting around 640x480 at best (usually).