Kuo thinks that the 31.6-inch screen”will target an extremely high-end position” and feature an”all-new design.”

An excerpt from Kuo’s research note, acquired by MacRumors:

We feel that mini LED, in comparison to OLED, will be a more convenient solution to provide wide-color gamut (WCG)/high-contrast/high dynamic range (HDR)/neighborhood dimming features because of its longer life and no burn-in problems for Apple’s moderate – and – large-size products targeting at productivity positions.

Apple’s stopped Thunderbolt Display

In a prior study note, Kuo predicted that Apple would launch both a 31.6-inch display and a 16-16.5″ MacBook Pro in 2019, so it’s not entirely clear if the 15-17″ MacBook identifies another laptop or if Kuo currently considers the 16-16.5″ MacBook Pro is coming a couple of years later than he originally anticipated.
Apple plans to establish a trio of new goods with Mini-LED backlights over the subsequent two decades, including a 31.6″ display in the next or third quarter of 2019, a 10-12″ iPad in late 2020 or early 2021, and a 15-17″ MacBook in the first half 2021, according to well-known analyst Ming-Chi Kuo.