The most significant difference is the green primary, which is much closer to the spectral locus than either sRGB or Adobe RGB.

Adobe RGB's green primary is more blueish with a dominant wavelength of 534.7 nm.

Created by the Digital Cinema Initiative, DCI-P3 is designed for viewing in a fully darkened theater environment.

This resulted from optimizing for best light output with the xenon arc lamp projectors commonly used in theaters.

The D65 white point is the existing standard for common sRGB and devices (Adobe RGB also uses D65).

[20] Since iPhone 7, the built in camera creates images tagged with the Display P3 ICC profile.

[21][22] Canon created an expanded gamut color space they call DCI-P3+ using the same ~6300 K white point as DCI-P3.

This creates an accessibility issue for instance for red, purple, or orange text against black.