While first past the post is stupid, I don't believe you'll see that change anytime in the near future, I think some New England states have it for local elections, though.
We won't see any change, at least none that is positive and is designed to make the system better for the masses. We will probably see lower corporate taxes and lower taxes for the rich, but that doesn't help anybody but them. It certainly doesn't do anything for our atrocious schools, healthcare and crumbling infrastructure. But, the people who make the rules send their kids to private schools, they have the best healthcare in the world and they travel around in limousines and private jets so they don't see the infrastructure. And they do not care.