Windows 10: release date, price, news and features

Update: With Microsoft's big E3 2015 showcase about to go down as of this writing, we've updated this article with the news that Windows 10 will allow a connected Oculus Rift to stream games from your Xbox One in a cinema window feature. More details are below.
Also, we've highlighted the key features that Redmond has chosen not to include in the release of Windows 10 in a fun (but sad?) gallery feature. You can check that out right here.
Original article follows...
With Windows 8 and today Windows 8.1, Microsoft tried – not entirely successfully – to deliver an operating system (OS) that could handle the needs of not only number-crunching workstations and high-end gaming rigs, but touch-controlled systems from all-in-one PCs for the family and thin-and-light notebooks down to slender tablets.
When Microsoft pulled the curtain back on Windows 10 back in September of 2014, it was clear that, with an operating system optimised for PCs, tablets and phones in unique ways, the Redmond, Washington-based firm was onto something. Skipping the Windows 9 name entirely, Microsoft issued a public preview of the shiny new OS later that autumn, known as Windows Technical Preview (WTP).

• Is the new OS any good? Read our hands on Windows 10 review

You can try it out for yourself through Microsoft's Windows Insider Program (nearly 4 million have, as of May 2015). You'll need a Microsoft account to get it, and it's worth bearing in mind that it's not the finished product, so it will be a bit rough around the edges.
Since its September 2014 reveal, Microsoft held a consumer-facing preview of the upcoming OS in January 2015, and shelled out even more details during its Build 2015 conference back in April. As the months have passed through those milestones, new features rolled in with each Windows 10 preview build update. And now, with a release date announced, the OS is mighty close to completion.
Most recently, Microsoft's head of Xbox Phil Schiller joined Oculus CEO Brendan Iribe to announce that Windows 10 will natively support streaming Xbox One games to the Oculus Rift headset. When the device launches in Q1 2016, players can enjoy games on Microsoft's console through the Rift's head-mounted display within a virtualised living room environment in which you're facing your game on another flat display. Hey, it's a workaround that should at least get the buzz going.