Not many changes, usual old suspects.
What one should look for is the number of new billionaires. That shows the dynamism of the particular economy. If you look at that list, how many did not inherit the wealth but built it all themselves.
You will notice that the high tech boom (vibrancy there) has created a bunch of first gen billionaires - gates, ellison, dell. Even Bloomberg got there by riding his news organization on top of hi tech boom.
Walmart's Sam Walton would be the richest man in the world but his estate is spread amongst his children. Sam Walton became billionaire within the last 20 years and that reflects the change in US shopping trends.
The 2 Indian billionaires are basically inherited $$$. Kind of like the Tata family that was rich under British colony. There are a few high tech billionaires in India which made the $$ riding the hi tech boom.
I think a great indicator would be number of billionaires that got their billionaire status 10 to 20 years ago and has still remained billionaires(to weed away the paper billionaires as a result of asset bubbles).
If you look at Singapore, we keep trotting out the usual suspect, Wee (UOB), Lee (OCBC), Lien (OUB). Only Ng teng fong is first gen billionaire. But that reflects the tight control the Gov has on our economy. We do not have a transport tycoon because of SBS. No local Walmart tycoon because NTUC took it all. No shipping tycoons perhaps because of NOL. As the world's largest port we should have 4 to 5 shipping tycoons or billionaire calibres.
Forbes Special Report
The World's Billionaires 2009