Retire Retirement? Another 30 Years of Work at 50 plus?

I am not sure, I can square my life or rather the next 30 years of it with the idea of a 'new career'...
Working until I am 81 plus does not sound that exciting to me at least if I was to frame it in the traditional definition of work.
I do not see myself retiring anytime soon.

What got me thinking of this was Older workers take a new career path, Morice Mendoza's review (in FT) of Retire Retirement a book by Tamara Erickson (to be published on March 15).