
The London School of Economics professor Danny Quah forecasts that by 2050 the world's economic centre of gravity, a theoretical measure of the focal point of global economic activity based on GDP, will have shifted eastwards, as quoted in the Wealth Report 2012 by Knight Frank & Citi Private Bank.
There are now 18,000 centa-millionaires in the region covering South-East Asia, China and Japan.
While these countries can expect rapid economic growth, much of the wealth already held in developed economies will be maintained, according to Citi.
So, take a look at the top ten richest nations in terms of GDP (PPP) in 2050...
Note: GDP by purchasing power parity (PPP)
...

Singapore
Ranking: 1
2010: $ 56,532
2050: $137,710
...

Hong Kong
Ranking: 2
2010: $45,301
2050: $116,639
...

Taiwan
Ranking: 3
2010: NA
2050: $114, 093
...

South Korea
Ranking: 4
2010: NA
2050: $107,752
...

US
Ranking: 5
2010: $45,511
2050: $100,802
...

Saudi Arabia
Ranking: 6
2010: NA
2050: $98,311
...

Canada
Ranking: 7
2010: $38,640
2050: $96,375
...

United Kingdom
Ranking: 8
2010: NA
2050: $91,130
...

Switzerland
Ranking: 9
2010: $42,470
2050: $90,956
...

Austria
Ranking: 10
2010: $39,0773
2050: $90,158