HD-DVD is dead. Even an acquaintance of mine a stanch defender of the format finally caved and got blu ray player about 4 years ago.
He convinced me to get a player and an HDTV once the prices came down dramatically.
That being said i doubt they are going to come to your house and take your player and working discs away, if you enjoy them then so what if they don't make them anymore.
I am not a Sony plant of troll i don't even own a PlayStation beyond the original.
One thing i hate about the format though is that some discs won't play on some players even if they are updated to the current firmware. Its only happened to me once, but once was a nightmare. 99% of my discs work.
Imagine dropping 40 dollars on a box set and it won't play because the region lockout says you are trying to view it in another region, yet the disc and player are region A.