I looked into this to see where it was getting new information, and as far as I can tell, it is searching wikipedia exclusively. Useful for sure, but not exactly what I was expecting based on the title.
There are wikipedias in other languages - Maybe this framework could be adapted to translate the search terms, fetch mulitlingual sources, translate them back, and use those as comparisons.
I've found a lot of stuff out through similar by-hand techniques that would be difficult to discover on english search. I'd be curious to see how much differential there is between accounts across language barriers.
For broader implementation you would want to develop the approach further. The idea of sampling other-language Wikipedia mentioned in a sibling comment seems to be a decent next step.
Extending it to bringing in from wider sources would be another step. I doubt it would be infallible but it would be really interesting to see how it compares to humans performing the same task. Especially if there were a additional ability to verify written articles and make corrections.
If your goal is to generate a wiki article, you can't assume one already exists. That's begging the question. If you could just search wikipedia for the answer, you wouldn't need to generate an article.