Last year, IIRC, we all hated Blu-ray (except for the PS3 gamer-d00ds, and they were the #2 reason we hated it), so most of the people who were techie enough to have heard of Hi-Def were buying HD.
...That was back when it didn't really make a difference, though.
(There are no "last years" for Blu, THIS is the year we start the history count.)