The concept of virtual twins involves creating digital models that encapsulate comprehensive data about an individual's body, including medical history, responses to medication, and the specific shape and condition of organs. This technology aims to eliminate the guesswork in medical treatments by providing precise simulations. The video highlights a personal story where Steve, motivated by his daughter Jesse's rare congenital heart defect, began developing a virtual model of the heart. This initiative was driven by the need to help doctors better understand and treat her condition, merging his professional expertise in 3D imaging with his personal experience as a father. The virtual twin project represents a significant advancement in personalized medicine, allowing for more accurate testing and treatment planning.