From what I can tell, e-transfers will continue using interac's network, so I'm not sure if this will benefit users at all. Depends if banks integrate a new user-facing money transfer option. I suspect it'll take years if not decades for banking institutions to roll this out to users, though they may use this behind the scenes for inter-institutional transfers without Interac.
Someone who's more knowledgeable about Canadian banking and payment processing, feel free to jump in here because I'd like to know more as well.
RTR's membership requirements are set by PayCan, who have a mandate to foster competition. Any FinTech who can meet requirements can, in theory, hold a settlement account on RTR and participate. Interac has an incentive to keep the club small, so to speak, and prevent new up-and-comers from cannibalizing their market share.
From a competition lens, the hope here is that RTR levels the playing field for both the big banks and fintechs and opens the door to a lot more consumer-facing innovation. That will, of course, depend on the network effect and who gets onboard.
quote from the page:
As Interac e-Transfer payments begin to clear and settle on the RTR, we will put this world-class infrastructure to work for consumers and businesses.” Jeremy Wilmot, President and CEO Interac Corp.
Good enough for consumer to consumer use and some online use cases, but definitely not good enough for retail.
Or giving up and saying "alright, I guess I'll trust you and hope the money comes soon"