Nothing.
The reason is that PLM World was not the roll-out of v19; it was just a preview venue because of timing. The official v19 roll-out is mid-June, I believe, and the full set of press releases will happen then.
I did hear that v19 is heavy in sheet metal enhancements, though. Sheet metal was the main focus, animation was the second, and new assembly constraints to aid in animation.
--Scott
For some pleasure reading, try FAQ731-376