"Unrealized potential" refers to the abilities, talents, or possibilities that someone or something has, but has not yet fully developed or achieved. It suggests that there is more they could do or become, but it hasn't happened yet. Full definition
I think it is that sense of unrealized potential in all of us that I find most interesting. (bookbrowse.com)
so much unrealized potential in terms of Kindle software and Amazon's relationships with Kindle customers and content providers (kindlenationdaily.com)
More importantly, this gap represents significant unrealized potential for individuals, families, and communities. (educationnorthwest.org)