Microsoft accidentally released an internal-only Windows 10 build (18947) to the Windows Insiders in all rings. The new build appears to have a completely new Start Menu design, by getting rid of the Live Tiles which was introduced with Windows 8.
The new build also includes a GIF image search within the emoji picker. Checkout this post to see what has been revealed as of now.
Image by: NTAuthority on Twitter
By the time you are reading this post, Microsoft might have already revoked the Windows 10 build 18947, that was accidentally released to the Windows Insiders in all rings (Fast, Slow and Release Preview). Though it was limited to only 32-bit systems, but that was a big mistake.
Those who have received the new build, from their posts it has been revealed two new features Microsoft is currently working on. The "Live Tiles", which was introduced with Windows 8 on desktop, Microsoft is now replacing it with icons placed in standard Grid rows and columns.
Another new feature that includes a GIF image search within the emoji picker has been also revealed with this internal-only Windows 10 build leaked today.
Later, Microsoft pulled out the accidentally released Windows 10 build 18947 and shared how to rollback it if you have already started/installed on your system.