A good article, but if you take a look at the 7 problems that SENS "Strategies for Engineered Negligible Senescence" identifies as needing to be solved to address ageing the telomere length issue is just one subset of single issue (cellular senescence). Furthermore they appear to have fixed this only for a single cell type - white blood cells which are easy to obtain and do gene therapy on.

Nonetheless it is still encouraging progress...