My cynical self believes the "OPT OUT" exercise simply ticks a box in this system and does nothing else. Records are still gathered and easily shared amongst the privileged, the rest is just the same old public facade.
All my health specialists were all old school and although technically brilliant they understood the fallacies of the perfect human specimen all too well. Unfortunately my GP retired years ago, my optometrist a few years later, my DAME last year and my dentist yesterday. Buggah, I got no-one now, and having trouble finding replacements that I'm confident in dealing with that aren't overly prescriptive with transient minor issues (for most of my life I have not taken medicines, I don't even take aspirin). I can now see why people like me don't get to see a ripe all age.
I cannot see any benefit coming out of e-health records for the individual involved. On the other hand e-health records are a huge bonanza for pharmaceutical companies, insurance companies, government, media, and any other industry that deals with demographics and epidemiology.