What a lousy article. Half that info is bogus. The other half is old news.
The magnetic shift, as the article correctly pointed out, has happened quite a few times over the earth's history. It will NOT change the climate, as that's a factor of the physical direction of the earths rotation and orientation. It probably won't affect any bird migrations etc, and we really don't even know if that's how the birds navigate anyway. And sadly, it won't even change the way the water spins. Again, that has to with the physical poles and the earths direction of spin, not the magnetic poles.
All it will change how you set up up your compass, and how the GPS guys program their outputs. Because it won't change anything else about those satellite's, because the spin and gravity WON'T change.
Of course, we would be in the Southern Hemisphere all of a sudden. Then people would start saying that toilets flow the opposite direction in the Northern hemisphere, and whatnot. Yeah, I don't think it will affect much except bring out the loony conspiracy theorists.
The poles shift every 3-4 thousand years, slowly. North star will no longer be where it is, we will have an axis pointing toward Vega, the brightest star in the sky.