If they allow this to work with English -> English, I bet it will be very useful for lecture videos where the speaker does the "uh uh uh um um umm" thing (since those utterances don't get added to the subtitles.) I'm looking forward to trying this.

Also, I think some people are fixating on "forget subtitles" in the headline. Youtube obviously aren't going to take subtitles away. The article doesn't suggest that people stop using subtitles. It's just a meaningless figure of speech.