 Fitbit ushered in the modern-day trend of using wearables to learn about your own individual health data, whether it be step counting, sleep tracking, or continuous glucose monitoring. By 2050, I predict that wearables loaded with sensors will eliminate the already dubious annual physical and send most of our primary care doctors the way of switchboard operators. Before the advent of continuous glucose monitoring, people with diabetes had to prick their fingers throughout the day. Some 540 million people live with diabetes worldwide, a number that's expected to grow to almost 800 million by 2045. The global prevalence of obesity tripled between 1975 and 2016. On one level, that's a free-market success story. Fewer people are dying of starvation than ever before. They're now experiencing the consequences of gluttony and abundance. But over the next 27 years, we should expect better drugs and devices detecting problems earlier and more accurately than ever before.