I think the general rule of thumb is that any media format
backed by Sony usually ends up by the wayside. Look at Betamax.
Sony's put its weight behind
Blu-Ray in the form of their PS3, but it's still anyone's guess as
to whether that format will prevail. Looking at the number of
titles on hi-def disks released each week, it appears HD-DVD
currently has a slight numerical advantage over Blu-Ray. If that
means anything.
Tell you what, though: I was over at a friend's house last Friday
and watched the Ghost in the Shell Solid State Society standard
definition movie DVD on his HD-DVD player which upconverted the
videostream to 720p for playback on his 50" plasma HDTV. Even with
the upconversion, the image quality was stunning. That about clinched it for
me to make the plunge into HDTV.