The Xiph.org project has always maintained that if there are royalty free audio codecs available for everyone, then we've won. We never cared that they were ours, but no one else seemed to be building them.
It's a little silly that Apple rolled their own when a perfectly good option was available, but the world still wins.
I hope they try and get it standardized. That would make it even better.
Nothing much? People with lossless collections in FLAC are likely to continue building them in FLAC. And if they switch over to AAC, then there is no loss. With free lossless audio codecs, everyone wins.