I suppose if the supernova kicked off rapid biological evolution all over the bubble at the same time, it would imply that interstellar explorers from Earth will find life on other worlds at an order of magnitude similar evolutionary development.
By which I mean animals instead of nothing but single celled organisms.
A supernova is one hell of a starting gun!
Another consequence: if you are a scifi writer who hasn't heard the bad news about the Bussard Ramjet, you may be concerned that Earth is in the middle of 200 light-year empty bubble with no Bussard Ramjet fuel. Since the supernova has thoughtfully blown it away
