Full explanation is on below link:

https://blog.nem.io/how-local-and-delegated-harvesting-works/

In delegated harvesting, you still own your XEM, but you delegate the harvesting function to a remote node (can be your own supernode hosted in the cloud if you prefer).  You can power off your local wallet and still continue to harvest, and any harvest XEM will go into your local wallet.

If you can afford 3M XEM, a supernode is a better option to earn daily XEM. 

Here's another Hitachi/PointInfinity article
http://www.econotimes.com/Hitachi-to-implement-Tech-Bureaus-Mijin-blockchain-technology-to-PointInfinity-559640

A lot of good news and yet price doesn't move. Need advertising. I think.

Sakura Internet Inc., Tech Bureau Corp., and Arara Inc., recently collaborated and performed extensive tests on the Catapult Blockchain solution. http://mijin.io/en/814.html via @mijin_io


Conclusion

The tests appear to meet the requirements as specified. There was no reported inconsistencies nor failure. The tests pass all requirements and the solution appears to be suitable for use commercially. The benchmark set was high at about 3,000 tps per second and the solution passed the test.

I'm loving reports like this. When independent companies are testing a solution and showing that it meets the specifications, you can be quite sure that it really does what it is supposed to do and that there is a good chance that it will be incorporated in their future plans.

As a non tech guy here, Will a private mijin chain be able to connect through the NEM public chain to another mijin private chain? or is that even possible.

All my harvested blocks are empty, just a few of them has some XEM. When is going the time when all the blocks contains a considerable amount of xem.

With mainstream adoption  

I'm not running a supernode, my wallet says i need to update the wallet, is this neccesary? im just normal harvesting.