I theorycrafted this tech like 5+ years ago when I was drawing up plans for my dream mmo. Could be promising, but it's just a tool and as usual it'll be up to game devs if and how they use it.
For those that still don't know what the demo is saying, it's backend server tech to get multiple servers hosting a single shard/realm/map
So basically unlimited open world game is possible with no zoning and huge player population.
One thing I dislike off the bat is it sounds like they plan to host the servers themselves.
If they give no option to use the tech on servers they don't own, then it's probably DOA.
I don't know if they're trying to sell the tech, or use the tech to sell server hosting. Right now it looks like the tech is free, but maybe cause it's Alpha.