Not every one has spent thousands on AV gear. I have a 32" Toshiba tv (£550 from JL), LG BD370 (again from JL but was a gift so cost nothing). A Sony stereo amp (E-bay, £45) and a pair of Mission 700 speakers (E-bay, £23).
With this gear I'm hardly going to be wasting money on expensive cables.
BD may have taken off among videophiles but not with the general pop'. You only have to take a look in your local supermarket to see proof of this. My local Tesco has hundreds of dvd titles but only about 30 BD ones. If a dvd is only a few quid then you may well pick one up while doing the grocery shopping but not a BD at £18