I know this is a silly comment but: 12” iPad Pro made my brain skip a frame.

12.9” rounds up to 13”. I carry both a 12.9” iPad Pro and a 13” MBP, and they are practically the same size, the iPad is slightly bigger on the small dimension and the MBP noticeably wider on the large one, due to the different aspect ratios. Picked up the iPad to use with Duet, and have been pleased with the combo, nice to have two full screens to work with while coding.

Ok, nit picked. ;-)