dvd players w/progressive scan

[double07]

was told that dvd players with progressive scan will show a movie in twice the resolution than a regular dvd player. if so, would a progressive scan dvd player make my vcd's look any better?

[JHebert]

First, a DVD player with progressive scan output is only better for DVD on HDTV which supports progressive scan input. Regular TV sets do not support progressive display but are interlaced only.
Most commercial DVD movies are encoded with progressive display at 24fps because they are sourced from film. Normal DVD players convert this to NTSC interlaced 29.97fps on the fly for display on regular TV. A progressive scan DVD player can send a progressive signal to an HDTV set which does give a better picture.
VCD at 352x240 is a progressive format with no interlacing, but I doubt that it would look any better from a progressive DVD player on an HDTV. It might actually look worse because the high resolution of the HDTV would show the limitations of the low resolution VCD.