What would happen if in the future I got an official update from Verizon and i'm rooted?
It will unroot you if you accept it.
You should be able to re-root again after, but not guaranteed...sometimes root exploits get closed in updates.
Best, if you want to keep root, is turn down the update. Usually a version of official updates you can install w/out affecting root are available for install shortly after the official release.