As Windows 10 follows Service model, where rather then waiting for a new OS after every 2 or 3 years, patches after some months are released which brings significant changes to the Operating system.
The November upgrade to windows 10 was the first example of this, where the version number was changed to 1511 and build number was upgraded to 10586 from the older 10240 respectively.
Now, in continuation with this, the next Major upgrade to Windows 10 is expected this July which would be a more bigger upgrade than the November update, which is coded internally as Redstone.
- Extensions for the Edge Browser:A modern browser should mus have support for extensions, which Edge has not currently.However, seems like Extensions would arrive for Edge in the next Major upgrade.
- Floating Cortana:This floating mechanism would allow Cortana to appear on top of documents, contextually, and provide information and assistance.
- Onedrive Placeholders:This was a very handy feature in Windows 8.1 but was dropped in Final version of Windows 10.It helps us to make the Onedrive Files making available offline or online only.Now the files cannot be stopped from downloading to the computer.
- Action center improvements:The Action center would also provide widget like functionality.
The Redstone build was available to Insiders who are on a fast ring.The build number is 11082.
This is it, I would update this as soon as more info becomes available.