At this stage in the development process, as expected, Microsoft is focused now on squashing bugs and fixing broken features so it can release Windows 10 Anniversary Update to the general public. The expected delivery date for Windows 10 Anniversary Update still remains on or around July 29, which would be the one-year anniversary of the release of the first version of Windows 10.
There are quite a few other browser, Cortana, Settings, Start and other fixes for both the PC Build 14366 and Mobile Build 14364 releases, as detailed in Microsoft's blog post. There also are still a number of known issues for both builds, which also are listed in Microsoft's blog post.
Microsoft is expected to release not only Windows 10 Anniversary for PCs and mobile phones this summer, but also the Windows 10 Anniversary update for Xbox One around the same time, as well. The Windows 10 Anniversary update for Xbox One is currently in preview with select testers.
Microsoft officials announced this week that via the company's Xbox Play Anywhere capability, gamers will be able to buy certain games once and play them either on Windows 10 PCs or Xbox One consoles later this year.