PPG Innovation 2026: Can "Smart Rings" Topple the Smartwatch Empire? While watches dominated the early 2020s, 2026 is the breakout year for the PPG-Enabled Smart Ring. These 2026 rings are gaining massive traction because the finger's skin is thinner and the blood vessels are closer to the surface, allowing PPG sensors to get a much cleaner signal than they can on the wrist. By 2026, many "bio-hackers" and sleep-deprived professionals are switching to rings for...