Wife and son saw HD sets and programs today.Demo loops of CBS shows,HawaiiOpen,Discoverychannel.Not impressed.Comments of 10%-15% better than 20inch tv at home. Bigger but not really much clearer.Could they be right? Maybe HD makes large sets better and thats it.There must be more to HD than that I hope. I must admit the 20inch tv has put doubts about it being that much less in picture quality than HD. Comments?