All displays over 480 are doing that (up conversion) already since they need to display the DVD's native 480 signal in higher resolution. The advantage of processing in the DVD player is that the conversion would be performed all in the digital domain.
That part of the process that makes the picture "better" is called interpolation, which is supposed to lessen the "digitized" look of the picture by using more pixels. While some people view the picture as smoother/with more depth, some view it as softer. So whether the picture looks better to you at all is subjective.
That part of the process that makes the picture "better" is called interpolation, which is supposed to lessen the "digitized" look of the picture by using more pixels. While some people view the picture as smoother/with more depth, some view it as softer. So whether the picture looks better to you at all is subjective.