Why go HD?

High Definition is a format introduced by AV giants in which the resolution has a quicker interlace speed compared to normal cathode ray tube (CRT) which operates at a lower interlace speed. Since the eyes can't detect the interlace process, the brain interprets the images as moving in harmonious flow.
You can use a hphone VGA camera or a compact camera to see the 'flickering' effect but it is impossible to detect the flickers on HD TV. A  florescent bulb flickers at 1000 times per second thus the light seems to be glowing continuously. HD TV is specially made to work perfectly with HDMI cable, the perfect footage you see on the HD TV at the shopping mall should not sway you. Look at the video player which feeds the footage. Normally they play BLu Ray disc in order to showcase crisp and highly detailed pictures. If they use normal coaxical cable (terrestrial TV), the image will be of less quality and of course it can affect the customers' decision. When you change the setting of HD TV, make sure you opt for 16:9 widescreen mode. If you want to watch high def pictures, buy a  Blu Ray player. Even a post-paid TV company could not provide HD format for all the programs shown. Only specifically selected programs are availabe in HD. The rest is still shown in standard definition eventhough the receiver utilizes HDMI.