An interesting side effect could be that public figures would become more careful, because if you're sunk, you'd be done forever.
Plus the shift from old people retirement driven politics. Much bigger focus on handling employment.
Genius appears to decline with age. Prolonging life would not necessarily preserve genius, even if it preserves life.
I respectfully disagree. Also, the article in question, and my comment, are really pointing to prolonging life, not a cure for ageing--that may be very far off. In either case, it is not at all obvious why prolonging or curing the ageing process in life would necessarily maintain optimal neurological function.
There's also problem's outside the scientific challenge itself. One being that genius is almost always only genius after the fact, raising interesting hypothetical questions about who exactly is preserved in their genius state - a promising 20-something, or a proven 40-something?