There's a host of rare diseases that originate from mtDNA mutations that this could have applications in. I know the tech/Silicon Valley crowd tends to love anti-aging stuff as well, so for all y'all into life extension stuff, this should interest you as well because of mitochondria's hypothesized role in aging[0].
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4779179/