Why does my order on Dell still say Order Processing?

I ordered an HDTV on Saturday from dell and the estimated delivery date is today (5 days later). When i go to the my order screen it still says order processing but the estimated delivery date has not changed. Is there a reason or has it just not been updated yet? I am not to sure whether i should call them or not.Why does my order on Dell still say Order Processing?i would give them 1 or 2 days if it does not get delivered then call them.