Singapore planning to raise retirement age from 62 - how should our investment strategies evolve to take into account a later retirement timing?

If you plan to retire by 40 or 50, you can still do it. You dont have to follow the SIngapore retirement age. Unless you decide to retire later for whatever reason. You can make sure that your investment are less volatile when you are older and nearer to your retirement age. So that you wont have trouble retiring at your target retirement age when market downturn happen close to your target.