My prediction is in 20 years Asian will be considered part of white. Maybe it's just being in the Silicon Valley bubble, but it already feels much of the way there.
(Not trying to offend anyone, but feel safer with throwaway account.)
This isn't a crazy prediction. "White" means a lot less than people pretend it does. Before the 20th Century, it excluded many European ethnicities. At various points, the Irish, Italians, Greeks, and Jewish people have been "non-white". Solidarity among the relatively fair-skinned only became a thing during the fight to perpetuate Jim Crow, and as a response to the Great Migration.
It's hard to pin this down because there's a powerful cultural normalization effect around "whiteness"; we accept the notion that there are "white", "black", "latino", and "Asian" people, in part due to history and in part because breaking "white" down further would be cumbersome.
But it's worth remembering that while there really is a sui generis "black" culture (the US African American culture, a product of displacing millions of Africans and stripping them of their original culture), there isn't "white culture". Irish and German people don't have that much in common culturally: they don't share a language, they don't eat the same food, they don't listen to the same music, they don't have the same folklore.
Since one important sense of the concept of "whiteness" is "membership in favored ethnicity", it's not unreasonable to predict that it will eventually expand to include non-European ethnicities, too.
(Not trying to offend anyone, but feel safer with throwaway account.)