What an interesting topic! Thanks for making me aware of that book, normally I would avoid anything written by anyone involved in politics just cause I don't like them (politicians that is) but I think that would be an interesting read from someone who was in quite an informed position (hopefully).
I don't think everything will be as bad as has been suggested by others but I do think we are in for some changes. Therefore I think
China will become more powerful than they are now, through their rate of growth will have slowed and their military capability will have increased. Hopefully they will use that new influence for the benefit of the world with countries like north korea though I fear it will be a mixed bag and countries like tibet will still have it hard from them.
The euro will have broken up, maybe so there are fewer member nations, but countries like Greece will have their own currency again and they will be a growing economy again.
Germany will continue to do well, though their growth will also have slowed and there will be more parity within Europe.
Scotland will be an independant nation or have so much devolution they may as well be.
The Falkland islands will be transitioning back to Argentinian control, whether that is that they choose to switch or that they are taken, either way I don't think we will have the military capacity to fight so far from home with so few resources.
Hopefully the Arab spring will produce some stable governments who will be working with and exerting pressure of any regimes still in place and will be a stronger area for it.
Pakistan will be a contentious issue, as a nuclear armed country in turmoil with terrorist, extremists.
I hope we will become more conscious of our consumption which will be reduced either by everything getting too expensive or by things becoming more upgradable, instead of disposable. Cars will increasingly be green, not because of global warming but as a cheaper alternative to oil. You will still have gary boys racing them round.
Individual gadgets will be self charging with solar power.
Diabetes will be a major problem and there will be much stricter regulation on food and its contents, though I think intensive farming (which I hate) will increase. People will grow additional fruit and veg as prices get even higher.
Britain will resume its manufacturing industries and hopefully building more nuclear power stations in conjunction with greener alternatives as a long term investment.
If you got to this point, well done, I didn't think I had written so much and I still have more!
