Does "Progressive Scan" look REALLY better than the 'Standard' (480i I guess)?

I have an 'older' 36XBR250 Sony WEGA TV (non "Progressive Scan") and I am kind of envious that the newer models (400 and 450) have the "Vertical Squeeze" and "Progressive Scan" features.

Now back to the question again:

Does "Progressive Scan" look REALLY better than the 'Standard' (480i I guess)?

Many thanks in advance!