Ready Player One and A Quiet Place both premiered at SXSW this year and have been doing quite well at the box office. I read an article that attributed some of their box office to the festival.
If you're wondering what other discoveries came out of the festival, you might appreciate my SXSW 2018 recap. In this podcast episode, I share some of the installations, keynotes, films and music that caught my attention. The audio is over 2.5 hours, but you can get the highlights in the show notes:
http://podcast.nsavides.com/SXSW2018recap