B&W vs. Color [video]

I just found an interesting post on TwistedSifter.com - "Adding Color to Historic Photos"
Have you ever wondered how Black&white pictures would look like in color?

"Artist Mads Madsen has an amazing skill for colorizing old black and white photographs."

Here are some black&white photos transformed into color:

Albert Einstein_pic colorized by Mads Madsen

Butch Cassidy ad the Wild Bunch_pic colorized by Mads Madsen

Charles Darwin_pic colorized by Mads Madsen

Frederick Douglas_pic colorized by Mads Madsen

Migrant Mother_pic colorized by Mads Madsen

Here is a youtube tutorial on how to colorize Black&White or vintage photographs:



What do you think about that? Should we keep black&white photos or colorized them?