Surprise! It's a new removable brake mount design!
The titanium grub screw market is now officially wide open
Up until a couple of years ago kids were suffering the obscenity of having impotent and demoralised brake mounts de-cooling their life when they rode street. Inexcusable. And frame manufacturers were being forced into producing two versions of every frame just to keep these little pricks (ahem... valued customers) happy. Ying was not yang.
So desperate was this situation that Fly came up with the idea of removeable mounts and, not surprisingly, every frame manufacturer saw the chance to realign their inventory chakras and jumped on board. Fair enough, but you think that one of them could at least have chipped in and done their part in the evolution of the idea. Instead Fly have done the evolving, and now, by undoing a little grub screw in your frame, you can remove the brake bosses with brakes still attached and so avoid fiddling cables, barrels and knarps each time you do it.
That's good, but were I see the major advantage is that when you turn 30, you can just put your brakes back on without having to avoid the temptation to buy a 24" or worse still - a cruiser.
In terms of exactly how this all happens it's probably easiest if you just watch Sergio:
Since most people either ride brakes or don't, you'd have to say the original idea was a bigger deal than this in that the real advantage was for the frame manufacturers and that race has been run already. But since this design shouldn't cost any more than the current standard, it's hard to see why those manufacturers won't now switch to similar systems - it's like something for nothing. And who doesn't like something for nothing? It's just so much better than nothing for something. Follow?