Hardfork!? Any other link to read more details about this, as in the one you provided is just stated that will be a fork. Thanks!
The Hyperspace team is forking the Sia codebase and will be generating ~3.5B Space Cash to be freely distributed to all Siacoin holders in order to encourage people to learn about and experiment with the Hyperspace network upon public launch.
https://hspace.app/airdrop