I've personally started showing my support for Blu-ray, simply because I have a PS3 and have no desire to get any sort of HDDVD player.
For people that don't notice the difference, well chances are the demo units then that you saw weren't configured correctly, be it wrong cables or wrong resolution selected on the TV (unless it was all connected via HDMI) and then there's always the whole distance issue.
I've currently got my PS3 connected to my Dell2405 monitor so it is displaying the full 1080i picture (no 1080p due to lack of HDCP on the monitor

) and I'm really enjoying it, the difference between a normal DVD and a HD source is instantly noticble for me personaly

and to boot, Blu-ray currently has more movies out for it compared to HD-DVD.
Now just for The Matrix to come out on Blu-ray and I'll be a happy geek =]
Jam it back in, in the dark.