An HC would be a small room dedicated to measuring all the things that can serve as indicators of health. I'd love to have a room I could step into that would take high res photos of my skin to send to my dermatologist, analyze various samples of fluids, maybe take retinal photographs, etc.
With the advent of ML driven diagnosis in medicine there is the potential that if we collect a huge amount of data it can be processed automatically. In addition data could be aggregated for population wide analysis.
While this could be correlated with my full genetic profile, I'm much more interested in how regular measurement with lots of low cost sensors could impact healthcare.