We all know that Best Buy isn't above deceiving their customers into purchasing their pricey HDTV calibration service, but it looks like they have changed tactics by using different cables on side-by-side displays.
A Consumerist tipster caught his local Best Buy running a display highlighting the difference between a calibrated and an un-calibrated HDTV. After further examination, the tipster noticed that the un-calibrated TV was hooked up with component cable while the calibrated TV had HDMI. As many of you know, component cable is output at analog, and some devices won't do 1080p without HDMI cables because of copy protection policies. Maybe, in this case, this made a difference in image quality, but generally when you're trying to show side by side benefits of a change, you have to start with the same system in place to avoid causing any doubt to their benefits.
Once again, Best Buy takes advantage of their customers by selling them something they probably didn't even know they needed. My advice is to educate yourself. This guide will teach you how to calibrate your HDTV on your own while this guide will help you buy an HDTV like a pro. [Consumerist]