Motionless keyboard - If the 16" MBP delivery date moves to 2020, and since the 2016-2019 MBP generation just got an update to butterfly V4, there is really no reason left for Apple to keep the unpopular butterfly keyboard.
For the 16"MBP2020 they can use their patented keyless keyboard. They can make it feel like a real keyboard, by adding their unrivaled leadership in haptic engine technology. This saves lots of vertical space, removes the dust issue on keyboards entirely, and puts them at a great design advantage.
If you think they can't do that, have a look at their oversized trackpads and haptic engines in any of the latest iPhones. However, Apple needs the Touch Bar for this, and no keys also means there won't be any physical escape key - never ever again. Some may hate this, but there is always the option to add an external keyboard.
With Apples update to Intel's most recent processor, and having eradicated pretty much all of the technical maladies of the 2016-2019 MBP series (T2, throttling, Keyboard, screen), Apple has generated sufficient breathing space to postpone the next MBP series to 2020 or 2021. We will be seeing an all new MBP! With more time to finalize that design process, I expect t Apple will crown it by use their own A13/A14 chips.