Is there any information on what blockhain the thing will be running on? Is it going to be one of existing chains or their own Proof of Authority based blokchain? Thus answering to question "how it's better than Ubisoft owned DB" with simple answer "it will be Ubisoft owned DB" and decentralization meaning distributed between 10 servers in different AWS regions. The servers can vote for adding new trusted authorities, but since the initial set is fully controlled by Ubisoft or companies that Ubisoft has contract with, they will never vote for adding anyone else.