IMO, the only real thing that can push HD-DVD toward a win is price. If they hit $100 players in holiday 2008 while Blu-Ray sits at $200-250, they might be able to pull it off. Maybe even a $200 player this holiday vs. a $350 Blu-Ray player will jump their sales a fair amount.
But, like I said, it's nearly a non-issue. Until the standalone players (for the love of God, don't bring up the PS3 sales anyone, they don't impact much in the long run) start selling in the millions per year, this ain't gonna matter one bit.
HD-DVD need to get the backing of more studios as well....it like the PS3 situation. They need to lower prices, but need the software to back it up.
HD-DVD players have always been cheaper than BluRay, but the prices are now starting to come seriously down to a level where people could start picking it up. Although as has been mentioned by a few on here...it is very early days yet and it may be another 2-3 years away before people start buying into the whole HD thing. Although it seems that prices are coming down quicker for HD than normal DVD.
Prediction (June 12th 2017)
Permanent pricedrop for both PS4 Slim and PS4 Pro in October.
PS4 Slim $249 (October 2017)
PS4 Pro $349 (October 2017)