I'm quite positive the CERN measurement equipment as well as the methods followed the best current knowledge. So, at the very least it will teach the whole world something about those practices when the reason for the errors is revealed. Because likely they are measurement errors. However, on the off chance they weren't, it wouldn't change as much as Y said. Because obviously a lot has worked for us thus far, so within the current practical margin, much wouldn't change. It's not like something obvious only on the galactic scale at minimum would affect the precision of GPS or communications through optical fibers that much.