DVD compression question? Why go 720 x 576?

Ok so normally I would send my 1920 x1080p clips to compressor and ad the DVD best quality preset.
But this only gives me 720x 576 pixels.
I am obviously losing a lot of pixels.
I see there is HD dvd in compressor which seems to have native pixels.
So why would I use that preset in compressor? Is it for "HD dvd" players? How do I know if I have a HD dvd player?
Can anyone help?

Currently, there are only two viable methods for optical disc delivery: DVD and Blu-ray:
DVD is standard definition only. However, some DVD players will upscale SD material to HD on output - this is NOT true HD; it's simply SD material being stretched.
Blu-ray can be HD or SD, but you'll need the appropriate Blu-ray burner and authoring software for creation ... and a Blu-ray player for playback.
The format known as HD DVD is dead and is no longer supported by any manufacturer. However, if you have one of the (now obsolete) Toshiba HD DVD players that were made, you could make and play an HD DVD. HD DVD discs will also play on Macs made within the last several years. They will NOT play in DVD players or Blu-ray players.
-DH

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