Historical note: amazingly, I still have some HD-DVDs. I saved the ones that were dual-format DVD + HD-DVD. My HD-DVD player broke years ago and I eventually got a Blu-Ray player, but anymore the discs are just gathering dust. Eh.
How did Sony win a format battle? This is horrible. Anyway, I'm keeping my HD-DVD player and all my HD-DVDs (and not buying a Blue-Ray player) until I'm either forced to switch formats, or something better comes along. It's not like they're gonna spoil. I refuse to support Sony as long as they're being stupid about DRM and copyright law.
On the plus side, HD-DVDs should be nice and cheap for a while! Get 'em while supplies last!