I hooked up the tab to the tv, cranked up netflix and nothing. I plugged in the power adapter and got a picture. So needs charger to plugged in to work. I wasn't real keen on the output, but was only testing for connectivity. Might come back and edit after I have chance to adjust settings.
Today, I plugged the cable into the second hdmi port on my tv and it does mirror the tab display. Good response time too.
The charger is necessary but it does not charge the Tab. Left it plugged in and battery was down to 38% before i noticed.