This article was published today on the mothership regarding Pro Tour Kaladesh.
http://magic.wizards.com/en/articles/archive/organized-play/pro-tour-kaladesh-faq-2016-10-13

It speaks about a modified single elimination bracket that will be used at PT Kaladesh.

We've seen test runs of such changes like the Vancouver Mulligan at PTs in the past.

I can definitely see the demand for this since it really looks like a feasible solution for those TOs and Players that disliked the “Drawing into Top 8”

I was wondering if this change to the top 8 bracket is also a test run?
If its deemed “successful” when could we anticipate using this modified bracket for other events?

I'm not going to call it a “test run”, but it's definitely something to be evaluated by Wizards' Organized Play. If they determine that it's appropriate for Pro Tour events, they'll likely repeat it; if they determine that it's appropriate for other events, they'll announce it (and change policy documents to reflect that).

For now - WAY too soon, dude. :)

d:^D