It hasn’t been confirmed they’re rebooting the Inhumans. It’s only been rumored that they’re casting Black Bolt and Maximus for the Ms Marvel show. If the rumor is true — cool. Marvel can do what the comic books have done for years, and pretend that bad stories didn’t exist and do a do-over. The Inhumans was like a bad run of comics that can easily be wiped away from continuity and replaced with something better. Hardly anyone saw the television show before ABC put it out of its misery so Marvel will have a much easier time doing a reboot of that then they will with Daredevil(if they go in that direction) because the bar has been lowered so much.
So the Inhumans are kind of in the same boat as the Fantastic Four are now in when it comes to its state as a franchise. After Fan4stic, Marvel Studios will reboot the FF into their universe eventually.