Microsoft's got a lot of hype going behind the release of Windows 10. One of the major selling points is that for a lot of users they'll be able to upgrade free of charge to the new OS, which if you've ever paid for the installation of an OS you'll know is a very attractive selling point to push it with. They've been saying that they plan to release it towards the end of 2015, but sources are now saying that it's now been confirmed that it'll be releasing much earlier than that.
Supposedly the CEO of AMD Lisa Su let slip the detail during a call with financial investors last week, saying that the new OS was due out "at the end of July". AMD are apparently holding off on the marketing of their Carrizo technology to factor in "the Winsow 10 launch at the end of July."
It's not known whether or not this is legitimate information but AMD would have to had been working with Microsoft on DirectX 12 as well as other OS compatibility issues with their hardware, so it's not out of the question that this is true. Alternatively it could just be that another more complete beta version will be released at the time, replacing the current technical beta.
Stay tuned for details as they emerge.