This is a really good idea, but it seems somewhat unlikely to happen in the USA - not least because of how valuable that information is. It's not just something

This is a really good idea, but it seems somewhat unlikely to happen in the USA - not least because of how valuable that information is. It's not just something that's used by individual companies, it's something that they can trade and sell. Giving consumers the ability to take their data from one company and give it to another (in exchange for a discount, perhaps? Someone would definitely try that) would have the potential to cut into the profits of companies, and so I would expect them to lobby against it.