Personally, I think triples will make a comeback. The primary reason is we are running out of room around the rear hub. If electronic FD shifting becomes the norm, more specifically, a computer takes over FD shifting, you will see 3 maybe 4 in the front and less in the back. That will take the rear DO spacing back around 110-120 and give them room to further advance drivetrain/braking systems. It makes more sense than a 1x 14-15 system. Just my .02, I could be wrong.

Edit: From a profit making standpoint, I could be wrong.