re: No need to update your will.
Hopefully whatever we evolve into will have already spread across the galaxy. Perhaps those staying behind on Earth will restart the Sun, or move the Earth to a new sun. Who knows what our evolved descendants will be capable of in a few billion years.
But then there is the End of the Universe. If the Universe expands forever and there are no other universes, restarting stars may be the way to go. Of course, our evolved descendants may just want to do their direct matter to energy conversion- it would be less wasteful than stars.
And if the Universe collapses and restarts as another Big Bang, perhaps our evolved descendants will be able to move far away (Perhaps taking their solar systems with them) and wait for a new universe to be born.