https://www.cnet.com/news/apples-12-inch-macbook-gets-a-new-gold-color-and-ditches-its-old-gold-color/

The MacBook's other specs and pricing will stay the same, so don't bother replacing your 2017 gold MacBook with a 2018 gold MacBook. Unless you really, really want to. 

Also, Apple's iMac lineup got no additional updates or changes.