Hi, it looks like there is some confusion about the upcoming HDTV optical disc players. I will try to help clear some of this up.
There are existing DVD players that upconvert the DVD video to 720p or 1080i. This is not true HDTV since it is merely an upconversion (although it can look quite nice). The Samsung DVD-HD931 is an example.
There are two formats on the horizon that offer true HDTV output: Blu-Ray Disc and Advanced Optical Disc (AOD). Nine companies including Sony, Philips, and Pioneer created Blu-ray outside the DVD forum. AOD (formerly know as HD-DVD) was created within the DVD forum (spearheaded by NEC and Toshiba).
As expected, these two formats are not compatible. But players of these formats will be made to be compatible with DVDs and CDs. These players should start to appear in the US in 2005. Sony is working hard at getting Blu-ray movies available once players appear in the US.
Note: these two formats are designed at their conception to be recordable fomats. Blu-ray is approximately 25GB single-layer or 50GB for a dual layer disc. AOD differs for ROM and re-writable discs: ROM - 15GB single layer and 30GB for dual layer discs, Re-writable – 20GB single layer and 35-40GB for dual layer discs.
Sony has a Blu-ray player available in Japan that is very expensive and will not be seen in the US (unless someone brings one over). They will have a player in the US probably within the next six months.
Who will win the upcoming format war is yet to be seen, but as it stands Blu-ray has a head start on AOD and a mighty powerful group of backing companies. I will definitely be excited to see what HDTV looks like at 36Mbps (Blu-ray) as opposed to the upper limit of 19.39Mbps for over-the-air broadcasts.
Quick note: the Sony Playstation 3 will have a Blu-ray player in it.
For more info see:
http://www.blu-ray.com/
And:
http://www.fact-index.com/a/ad/advanced_optical_disk.html