Good news. But this will just help Mijin make money, as they're offering a 30 day free trial, then charging $0.65 per hour. How will it benefit the NEM public chain?
The benefits are indirect, similar to Ethereum Enterprise Alliance. It is also good publicity, and developers learning your ecosystem.
And it will be easier for enterprises to use the Mijin private chain to host the necessary nodes to run the network. That is really great because every project on mijin indirectly helps the ecosystem in some part