The next few years are apparently going to be big for iPad and MacBook devices with the addition of OLED displays and foldable form factors. According to the latest report out of Korea, Apple could release its debut foldable device in 2026 followed by a foldable MacBook.https://www.notebookcheck.net/Apple-foldable-device-screen-size-and-release-window-leaks-alongside-report-of-foldable-MacBook.799653.0.html
It makes no sense to have an iPhone and 7 or 8 inch iPad! The foldable device should be an iPhone with iPad's features.