One could argue that if we are smart enough to make this work, we could be smart enough to have the machines take over as well but I am not holding my breath :)

Yes, retiring age will be delayed, like the politicians are already doing.

Perhaps the physical rigours of work will dictate a retirement age, similar to firefighters retiring at 55.

Today we retire for 20 years and last 5 years are pretty horrible for most people.

Adding 10 years to retirement and 30 years to life span means maybe 15 years living with severe physical and mental degradation.

So even if we retire at 90, pension funds will become unsustainable.