<正>Joe Consumer has just pulled into the parking lot of his local Best Buy,intent on finally plunking down the plastic for a high-definition television. He's been yammering to his buddies about the im- pending purchase for weeks.Now it's finally time. Joe knows he's going home with a set,no matter what.The only thing he doesn't know is what brand of high-def TV he's going to buy. If you're a consumer electronics brand,this is the moment to win the guy over.