I have been wondering something. Well, two things actually.

How proficient is the PS3's DVD Upscaling? When it is Double-Scaling something, is it making it near-Blu Ray quality?

The second part to my question is - Which would/should look better on my PS3:

A Widescreen DVD Double-Scaled to 1080i.
A Widescreen Blu-Ray in 720p.

See where the question gets interesting? Is the upscaling on the PS3 enough to make a DVD look better than or equal to a Blu-Ray?

I would really like to know, because it comes down to buying a DVD or a Blu-Ray... why buy one if the other could look the same?

Help me out here .