Why do you think U2 wouldn't do that? I mean promoting an album is not really a novel idea. They've done it in the past. And the release method of SOI didn't work too well. So why not go back to a proper promotion. This of course would not rule out a collaboration with Apple of some sort.
I think they abandoned the "proper promotion" model after NLOTH. I imagine one of the reasons they hired Oseary was to help them explore new and "innovative" ways of releasing their music. I highly doubt they'll do the exact same thing as SOI, but doing something unexpected and "cutting edge" is probably on their agenda.