The columnist is not very clear on HOW she thinks Hollywood has changed, in her eyes

I mean, is she trying to imply that, in past recent years, there was an unfair bigotry that refused to hand out awards to deserving black folks for their top-notch work? If so, what candidates were involved - which performance by a black actor or actress, which film by a black director, was unfairly overlooked in recent years?

Or is she trying to recognize that this year's award selectors were faced with a large number of black folks in prominent screen roles in successful films, and if so, did that arise because film producers afforded more funding this year for films involving black artists, or did it arise because audiences nowadays are more open to flocking to movies with prominent roles for black artists, or did it arise because the movies this year with black artists happen to have hit themes or narratives especially attractive to broad audiences?

It is actually kind of unclear what she meant.