I just watched this mental outlaw video about it, and he breaks down what this means, what cards it applies to, etc.
I'm probably not getting NVIDIA for my next card, but this certainly is a step in the right direction. If they prove they can keep up with the Linux ecosystem and play nice (e.g. the debacle around Wayland), I'll consider getting one.
For now, AMD provides a fantastic Linux experience and that'll need to be matched for me to even consider NVIDIA. NVIDIA used to be way better on Linux, but they broke that trust and it'll take a while for me to give them another shot.