Ah ... region coding.
Ok, so the thing is dead, but there are still people that *think* that HD-DVD didn't have region-coding. It did, it just was "disabled" because of the format war. Had this gone the other way, you'd find Toshiba, M$ and their siblings sending the "firmware of death" activating the region lockdowns and rendering your over-the-seas cheapo import HDDVD's unviewable.
As for me, there are a crapload of reasons for backing Blu-ray, even if I don't even have an HD TV or either player (or even a PS3).
1. The name. It sounds ugly, looks ugly, and feels like one of those "Microsoft MSN Live Windows Hotmail Mail service" hideous naming schemes. (Wait, who's backing this now?)
2. Storage capacity. Apart from being video-only (and yes, I know DVD stands for Digital VIDEO Disk and not "Versatile", and the CD being audio-only) it had lesser per-layer capacity. The argument given above about "2-layer HDDVD being better than 1-layer BD" doesn't hold for me, it didn't do it either when Apple went Intel.
3. Java. BD went Java, HD-DVD went behind some weird Windoze-only interactivity stuff. At least Java is cross-platform and might hint me that I won't need weird stuff (read: DeCSS) to be able to play my BD's on, say ... Linux.
4. Microsoft... because I'd love to see M$ *lose* something for a change. Thanks for backing the loser!! Plus, anywhere M$ gets its hands on, suddenly turns "Windows only" and I wouldn't let that happen with a next-gen format.
5. Arrogance. The HD-DVD group insisted to promote themselves as "superior", even with the technical flaws that gave them the lower hand against Blu-ray.
There are more reasons, but I just can't remember now. And those toting "downloads are teh futoore!!! dooodz!!!" seem to forget that harddrives sometimes die, and take away all your downloads, legal or not. I'd like to see the face of someone losing $1000 worth of movies because of the next Blaster virus...