Google’s Chrome OS is expected to make its way to tablet form factors in the not too distant future which is why it would be wise for Google to offer more features that improve the Android app experience on Chrome OS-powered devices. Split-screen support is one of the features which can contribute to that and it’s now available for Android apps on Chrome OS in the Canary channel.
For those who are unaware, a Canary build is a newly compiled version of the software that hasn’t been properly tested. It’s meant for those who just want to see what’s new as soon as possible and discover the worst bugs. These builds are certainly not meant for public consumption.