Well, most of what you get is verification. When the problem is entirely local, you can verify separately calculated measurements with other measurements. This

Well, most of what you get is verification. When the problem is entirely local, you can verify separately calculated measurements with other measurements. This is why I think we'll be able to move much faster to work on problems of similar magnitudes locally than on relativistic scales. While you don't know how many humans are within 5km of you, that's certainly easier to verify with confidence N than it is to verify how many humans within 5 light years.