A Device For Playing Hi 8mm Tapes Do I Have To Have A Hi-Def TV To Play Hi-Def DVDs And Games Through Playstation 3 And Other Hi-Def Devices?

Do I have to have a Hi-Def TV to play Hi-Def DVDs and games through Playstation 3 and other Hi-Def Devices? - a device for playing hi 8mm tapes

I look forward to a new Xbox and PS3 and the great feature of most of them is that everything is now Hi-Def. Playstation 3 can Blu-ray high definition discs as many films of today, and I wonder if I have an HDTV and use of this content? This is a high-definition television, or simply create added value?