The assumption is that Claude has access to a stream of fresh, currated data. Building that would be a different focus for Anthropic. Plus Thomson Reuters could build an integration. Not totally convinced that is a major threat yet.
It's definitely not a major threat, but many/most finance people are clueless about what is and isn't possible with LLMs.
Again, unless Anthropic are taking on liability for their legal tools, this is not going to impact TR.
That being said, there probably is a potential company here that's gonna be built soon/is currently being built, but it definitely won't just be a wrapper around Claude as the recall will be way too low for these systems unaided.