Productivity, agreed.

Ameliorating the effects of old age, disagree - too many people treat retirement at 65 to be a God-given right for any real bump in the retirement age to solve things any time soon. Remember, this was an age set by Otto von Bismarck, and it's remained unchanged since - we've already had massive increases in quality of life for the elderly, and it's done nothing to improve the financial footings of the pension system(Quite the opposite, really).

Automating the care of the elderly will help some, but you're still left with extremely low workforce participation and a very high dependent ratio. That's not a pleasant situation, even if you don't need millions of people working in nursing homes.