Agreed, I share the same expectations that nears the reality 
The Only reason I can think of Apple randomly decides to go with a 10.5” IPad Pro in 2017 is because Apple needs tons of volume to make OLED Displays and there already exists a 10.5” manufacturing partner with LG who made a 10.5” OLED Display for a Dell Tablet which was actually pretty good.
Here s a Link
http://www.dell.com/en-us/shop/cty/pdp/spd/dell-venue-10-7040-tablet
So this is the reason IMO there will likely be a 10.5” OLED IPad around next year in 9 months or so Minus the Home Button with Face ID and with the removal of the HOME button and less Bezels it might be smaller than the current 10.5” IPad Pro.
It doesn’t stop there. Alienware, HP, and Lenovo all have Amazing looking 13” OLED laptops on the Market right now. All these displays are made by LG, LG is making the panels.
Since the jump from 9.7” to 10.5” was well accepted No doubt Apple will be upping the 12.9” IPad Pro to a Full
13” OLED Display sourced and made by from LG to Apples Specs with 120hz Pro Motion.
So 2018 IPad Pro 10.5” OLED yet smaller and thinner than the current one.
And a 13” IPad Pro OLED And Maybe even 13” OLED MacBook Pros
We need inside sources at LG because a Big Order or Contract like this will leak.
Another telling fact will be if Alienware, HP, and Lenovo don’t offer 13” OLED Laptop updates for 2018 at CES in January because Apple will occupy all of LG production capacity.