Allow me to dream. About the future, about our never-ending quest, as a human species, for health, and where we stand in that quest.
You step out in the morning for your daily run. Perhaps it's spring in the Southeast, the mornings are cool, the pollen is thick in the air. A bay is miles off, but its influence on your weather is unmistakable: temperate winters with evenly hot summers.
As always happens, your central unit is cataloging your every move. Your shoes provide data, your light pants provide data, your shirt provides data, your watch provides data. As you begin your 6 mile trek, your central unit processes not only your movement in terms of kinetics, but also in terms of absolute position upon the earth. Your every stride is cataloged in terms of energy spent.
Your new eye contacts display the distance run, the time it's taken, your average pace. You notice that you're a few seconds off your best, so you start pushing it. Pretty quickly, your drenched in sweat, but your personal HUD tells you that you're on pace for a new personal record. It's going to be a great day.
You dial up that latest music you've been listening to, or perhaps your favorite podcast (though, really, none of the kids now-a-days call them podcasts. What an anachronistic term!). All of this with a few quick flicks of your eyes in concert with your teeth and jaws.
And quickly, over the next hour, you bang out a personal best. It feels good to be greeted to the sights and sounds of victory as you end your run. It's pretty amazing to reflect on where technology has come from.
You leave your run and head in for breakfast. As you eat, the implants in your teeth catalog your caloric intake, updating your daily nutritional log. You check it quickly to see how you're doing at maintaining your weight, and you see you're doing well. So long as you keep up the daily activity, you should be fine.
Once again, as you move through the house getting ready for work, the various sensors take stock of your movement, and what it means in terms of your daily health. Even the small things are cataloged, not a movement is wasted. You know, within 10 kilocalories, how much energy you've expended.
After you eat, the nano-network you have floating in your bloodstream goes to work checking that things are working well. While each individual nanocite is pretty dumb, as a network, they can measure an almost perfect picture of your blood health. They can catalog your insulin levels, your blood sugar levels, the number of lipids in your blood stream, so many things.
A few weeks ago, you were warned about a possible cold you had contracted. Your doctor's office, the same place that all of your data is daily uploaded to on a regular basis, contacted you with a prescription for heading it off at the pass. Luckily, you didn't have to suffer through it.
Of course, nano-networks need updating as new bugs are found and old bugs are retired, so you have to visit your doc every quarter or so for a new rendition. Luckily, the rendition is taken via pill format, so not too bad. They've been getting pretty good in the past few years, but there is still a long way to go.
As you head off to work, you reflect on what you know about yourself from technology at the age of 90. Your able to monitor and assess your daily health with the input of the vast array of sensors that now adorn your body. Your every caloric intake and energy expenditure is kept in balance. You have an early warning system within your blood that can detect an incredible array of sicknesses.
You are the healthiest you've ever been.