California has a GDP just shy of $2 trillion. If it were a country, that would put it at #10 in the world, just behind the UK, Russia, Brazil, and Italy; just ahead of India, Canada; bigger than Spain, Austrailia; nearly twice as big as South Korea, Mexico; and four times as big as Sweden, Norway.
That said, I seriously doubt this will have repercussions outside of California other than the capability being there if other legal jurisdictions should choose to require it. This isn't like a new formulation for gasoline, or an entirely new engine emissions system which needs to be designed from scratch. It's basically software, and it'd be trivial write to a PROM upon delivery or sale to permanently enable/disable the functionality. In this case, the cost of "manufacturing" two different devices for different markets is trivial.