I find it strange that blockstream hold up Visa as the holy grail in terms of transaction throughput and the need for Bitcoin to adopt sidechains so they can reach these levels. What they fail to mention is that Visanet can get this throughput because they do not make payments. All they do is provide the checking and reporting mechanisms to support the payments. Chase Manhattan in NY and London do all the settlements ( the actual payments to accounts).  Bitcoin, on the other hand, actually executes the payment. The  danger here is that they will make bitcoin just another reporting system.