Although people like to compare HD DVD vs Blu-Ray as VHS vs Beta, but I think there's a very big difference here: HD DVD has the same size as Blu-Ray disc, therefore it's very possible to build a (relatively) cheap all-in-one player, that is, be able to play both HD DVD and Blu-Ray discs. I think it's quite the same as the so-called SACD vs DVD-Audio... the DVD player in my home is able to play both format.