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The Invisible Patient: How Continuous Biosensors Will Make “Feeling Fine” a Medical Diagnosis
Your wristband detected a 14% elevation in cardiovascular inflammation risk at 6:14 AM. You felt nothing. Your AI scheduled a cardiologist appointment by 6:15 AM. Welcome to medicine in 2040 — where the most important patients are the ones who feel perfectly fine. The $109 Billion Question Nobody Is Asking The global wearable technology market exploded from $20 billion in 2015 to $109.3 billion in 2023. U.S. retail sales of fitness trackers surged 88% year-to-date in 2025 com

Prajit Datta
9 min read


A Wednesday in 2040: A Realistic Day in an AI-Powered City
Your Alarm Didn't Ring. Your City Did. It's 6:14 AM on a Wednesday in 2040. You didn't set an alarm. Your biometric wristband tracked your REM cycle overnight and gently raised the room temperature by 1.2°C, shifting the ambient lighting from deep amber to soft daylight to ease you into wakefulness at the optimal moment. Your apartment's AI assistant already knows you slept 7 hours and 22 minutes, that your resting heart rate dipped slightly (flagging a mild hydration deficit

Prajit Datta
11 min read
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