Taylor Swift Has Trademarked Her Voice. The Legal Frontier Has Been Identified.

Taylor Swift trademarked her voice across seventeen legal classifications. This means deepfakes of her voice are now exhibits in a future lawsuit rather than prevented incidents. The trademark creates no technical barrier. It creates a financial one, retroactively, for whoever made the fake and has assets to seize.
Celebrities have been protecting their likenesses in court for decades. The voice is simply the next category to formalize. Every new deepfake medium gets locked down this way, one expensive case at a time, always after the fact. The pattern is administrative catch-up disguised as innovation.
Deepfakes of Taylor Swift's voice will continue to be made. They will be made faster than lawsuits can process them. The trademark will be used to sue the ones where someone left a trail. This is adequate deterrence for some uses. Adequate deterrence is the only kind available.