Google I/O is happening on May 18-20, but forget Google I/O—the developer preview of the next version of Android is launching right now. Google has posted the Android N Developer Preview for the Nexus 6P, Nexus 5X, Nexus 6, Pixel C Nexus 9, and the Nexus Player.
Before you get too invested in the interface on display here, it's worth noting that the Android M Developer Preview has gone through several designs (like the weird letter-indexed app drawer) and features (day/night mode) that have not made it to the Developer Preview. In fact, the whole point of this super-early preview seems to be to gather as much feedback as possible. "The sooner we hear from you, the more of your feedback we can integrate," Google says.
As we saw in the Android M Developer Preview, Google has been working hard on matching Windows and iOS by building a native side-by-side app mode in Android. For Android N, the feature is apparently ready for prime time. The gallery above shows off the feature, which works on tablets and phones—it looks a lot like what is currently shipping on Samsung phones. The one question mark is how to actually turn it on and control it. On Samsung phones and in the Android N app preview, for instance, buttons on the recent app screen would trigger split-screen mode. There are no such buttons in the screenshots.