Is wearing Apple AirPods at a concert normal? Probably not. But it made sense at last night's Apple Music party. So goes the music portion of SXSW, which has traditionally involved Pandora, Spotify, Soundcloud and record labels throwing solid parties with fairly respectable lineups of artists, to say nothing of the dozens of showcases putting globally up-and-coming music talent on display. This year, however, we saw Apple Music make its mark.