Although I have met lots of folks who think that surround sound isn't worth the effort (by which I mean time, money, hassle and the incovenience of arrranging your furniature in such a way that surround actially works). I used to have surround on an old Widescreen Philips TV I had about 7 years ago. I found it really creepy. When I could hear sounds coming from behind me my brain just couldn't associate that sound as being part of the same presentation as the picture in front of me. So the sound was distracting. If the back channels just mimic the left and right (ie if you use a 5.1 setup to listen to plain ol' stereo) it's not a problem.
It's another weirdness I have I guess...