I do not see a large change to Kabby. The change your thinking about is the mid cycle refresh where they move up the standards.
They did this in the 2012 to 2014 units where suddenly 16 gigs was the standard on 15 units.
So I think that is a bit farther down the turn pike.
They are going to lower the price of the 15 until the mid product cycle refresh in 2018 when the chips support 7 stream 5k on the IGPU.
Thanks intel for making all of us who just want 5k displays buy 400 dollar more expensive machines cause you could not muster the "Courage" to make an IGPU worth a damn for a few product cycles.
Yup, Kaby Lake is practically a fact and fall is most likely: https://www.macrumors.com/2017/01/03/intel-announces-kaby-lake-processors/
I hope they sort out the battery issue in the next iteration the fall 2017 edition of the 15" rMBP !
Apple planned to introduce "higher capacity battery packs" that would have been terraced and shaped to the inside compartment of the computer, boosting battery life in the process. According to a person familiar with the creation of the MacBook, the battery failed a "key test," so instead of delaying the laptop and missing the holiday shopping season, "Apple decided to revert to an older design."