iOS 8’s SpringBoard includes code to run two apps side-by-side, according to a tweet from developer Steven Troughton-Smith. He notes that the code anticipates that side-by-side apps will be run at 1/4, 1/2, or 3/4 size.
While a previous report noted that Apple would add split-screen multitasking to iOS 8, Apple did not discuss the feature during its WWDC keynote.
So… just in case there was any doubt left… iOS 8’s SpringBoard has code to run two apps side-by-side.
1/4 size, 1/2 size, or 3/4 size — Steve T-S (@stroughtonsmith) June 9, 2014
Troughton-Smith noted in another tweet that side-by-side apps show up as one “screen” while switching through apps. It’s unclear if the feature will be activated upon iOS 8’s launch, or saved for a future release, such as iOS 8.1.