Google also has yet to enable key health metrics like oxygen saturation (SpO2) and overnight skin temperature for the existing Pixel Watch, although those might not require new hardware.
Whether or not the rumor is accurate, expectations are high if and when the Pixel Watch 2 arrives.
Google may have taken years to ship the first Pixel Watch, but it might not take nearly so long to introduce a sequel.
The current Pixel Watch is based on a 2018era Exynos 9110 systemonchip that leaves it lagging in efficiency compared to the Apple Watch and numerous Wear OS watches.