If you swap out private insurance companies for NHS (due to differences in funding), this is similar to the path the US is on right now. Within the next 1-3 years private insurance companies will know even more about your health than any single provider, and will use this more detailed insight to improve how they model, risk, and determine benefits for you in their favor. The people in charge of the funding fueling healthcare want to use data to improve their control of the money.