PCs, have ’em. Mac’s have ’em. iPads have ’em. Even foldable smartphones have ’em. What’s left? Wil has a couple of videos that show how:
Now, understand that’s just a software split-view built into iOS 14, not a dual-screen iPhone to match Samsung Galaxy Fold or Microsoft Surface Duo, but with iPhone displays getting larger every few years, it is easy to see an advantage in having such a setup.
Microsoft’s Duo looks pretty good.