So far I didn't know about it. Thanks for sharing.
At this time, I am a big fan of Radium stack.formidable.com/radium - yet still hoping for Shadow DOM github.com/Wildhoney/ReactShadow to be the future.
'style scoped' might introduce a new level of irritations because the selectors aren't expressive anymore.
But will keeping an eye on it. If it helps to write and maintain independent components, it will be adopted and used.