Excerpt from the article:
To help illustrate the difference between the standard DVD we've been living with for years, Microsoft corporate vice president Amir Majidimehr explains, "The standard DVD is less than one megapixel resolution, so when you think of your camera as many megapixels, the standard DVD is very low resolution."
The problem is that there's simply vastly more resolution and detail to be found in the original films, and with standard DVD, we're just not seeing that. HD DVD will finally offer the visual quality needed to see the film as it was originally intended.
Read the whole article here.