According to Apple anaylist Ming-Chi Kuo, both variants of the next model will be given a boost, but it's thought the company will slim down the bezels to fit the slightly larger displays.
In a new report, he said that while the smaller Apple Watch will have a 1.57 inch screen - up from 1.31 - the larger one will go from 1.54 to 1.78 inches.
It's also suggested there will be some improvements regarding the device's heart rate monitoring, and it's expected that the Apple Watch 4 will be launched in September.
Meawhile, it appears the next iPad Pro could be getting a larger screen too, with the 10.5-inch model being increased to 11 inches.
This will likely be achieved by losing the physical home button, and adding Face ID technology to still allow a fast and secure way to unlock the tablet.
The latest report comes after it was revealed Apple Maps would be getting a complete overhaul after it was found that many Apple users prefer to use a third-party app.
According to TechCrunch, Apple senior vice president Eddy Cue - who is now in charge of Apple Maps - said he didn't want to "rehash all the issues we've had when we introduced [Apple Maps]," and instead wanted to focus on "trying to create what we hope is going to be the best map app in the world, taking it to the next step. That is building all of our own map data from the ground up."