Will this initiative double the amount of time that we've got the full capacity of our 20s and 30s? Or will it just allow people a prolonged, half-century tour of the twilight years, from 70 to 120?
Trying to keep a damaged machine running without repairing the damage is expensive and futile. How far does changing the oil in a car or pressing the accelerator harder get you if you never fix anything that goes wrong in the engine? Similar situation.
The future will be radically different because researchers are now resolved to treat aging as a medical condition, to investigate the causes, and to intervene. The debate now is over the best way to go about it, and alas most of the research community remains fixated on the path that will cost a great deal and achieve next to nothing, which is to say efforts to alter the operation of metabolism so as to modestly slow down the aging process. Calorie restriction mimetics, autophagy enhancement, and etc.
If you want better results, you have to look to the rejuvenation research of the sort carried out by the SENS Research Foundation, the Big Pharma groups clearing amyloid, the new senescent cell clearance startups, etc. Slowing aging by altering metabolism is the expensive road to nowhere. Repairing the causes of aging is the more efficient, faster road to rejuvenation of the old and the prevention of aging.
Statements above are based mostly on The Brain That Changes Itself by Norman Doidge which I highly reccomend. Plus just listen to some old folks that you can tell are still quick - Warren Buffet 86, Chomsky 88, James Harris Simons 79 and so on.
I didn't mean to show by these examples that this is the default, or even that it's common. I don't think it is. But I hope it's getting better, mostly thanks to the technological progress which can be stimulating for those who choose to make use of it.
But if you look at aggregate data on chess players' ratings as they get older, or university professors' publication rates (and citations on the papers they do publish), it's really hard even for strong-willed thinkers to stay on top of their craft in their 60s and beyond.
For every Warren Buffett in business, there are a lot of Sumner Redstones ... holding on to power, but quite erratic as age takes its toll. Getting old is nasty stuff.
Wow 3 of them! And it helps to ignore the (likelihood of) older people who kept using their brains and now have mush upstairs.