Wouldn't make sense to do it now because there are no 1080p broadcasts. And to upgrade for sake of HDDVD is a big jump.
I see your point regarding broadcast HD but if you're buying a tv now I certainly would spend the little bit extra and go with 1080p. The Blu-Ray and HD DVD war will be settled in less than a year and more and more DVD's will be released with 1080p content. Also the players will come down in price to reasonable levels by that time as well.
My opinion if you're buying now buy 1080p and make sure the tv has 2 HDMI inputs.
Version 1.3 HDMI has not been approved yet. Most of the new Marantz gear is Version 1.2 and does a complete passthrough of both audio and video through HDMI. Denon and Marantz merged their operations last year. They also own MacIntosh, Boston Acoustics, Snell Acoustics, and Escient.
You're right it hasn't been released yet although I didn't know it hadn't been approved. I was under the impression that the PS3 featured 1.3 HDMI inputs and that's being released next month.
From what I've been reading by the end of the first quarter of 2007 new TVs and DVD Players will have the 1.3 inputs. I'm anxious to see what a true 1080p signal from a DVD will look like on a tv that can handle true 1080p. On screens above 50" it should be quite spectacular as long as the DVD was encoded well.
And it certainly seems like Blu-Ray has the lead but Microsoft, Intel and Toshiba all back HD DVD so it might be quite a battle. Although from the specs I've read Blu-Ray seems to offer more. Or at least it has the capability to offer more.