I just fail to see how a court decision in the US would have any effect on another country. It's not like OP's situation and access to emulators would have been any different if the decision went Sony's way.
I would respectfully disagree - although it's hard to speculate on alternative histories.
The United States has an outsized impact on the software industry - even for the largest economy in the world (American big-tech dominates the largest companies by market cap).
Preventing or impeding the development of emulation software in the US would definitely impact the rest of the world, simply because fewer people and companies can legally contribute to open-source Emulation software.
Their phrasing was a bit awkward though, when they say “Luckily emulation has always been legal…” one would assume they are talking about the jurisdiction they live in, by default at least.
US law is actually different enough from some other countries that what is legal in the US is outright illegal, and vice versa. If you want some low hanging fruit - anything to do with guns, gender identity, abortion, liable/slander and "free" speech - many countries disagree and actively oppose the US stand point, on both sides of the US position. Another good example is anything granted in the US constitution is not a "God given right" outside of the US (which probably intersects with guns and free speech, maybe other things). US passing a law is not going to change that.
DMCA does not affect other countries - we have our own laws - some of which were put in place in line with the ideas that caused the DMCA, but some of which predate it. Also - "fair use" is a wholly US concept, and might not apply, depending on where you are located.
By way of return, I fail to see how you fail to see precisely that.