Windows 9 Beta/Preview: When will the Windows 9 Preview be released?
As  noted earlier, a Windows 9 Beta this year is looking increasingly  likely. This would give Microsoft plenty of time to gather user feedback  ahead of a full release, and hopefully generate some goodwill from  hardcore users who could influence regular consumers.
Like  previous Windows previews, we'd expect the Windows 9 Preview to be open  to everyone with the usual caveats that you need to know what you're  doing to install it. Fundamentally, though, the main changes are likely  to be visual rather than structural, so it's unlikely to have any  problems with drivers and other common snags from previous Windows  betas. If you can run Windows 8 smoothly, the Windows 9 preview should  be fine.
Windows 9 Features: Could Cortana be a key part of Windows 9?
Cortana, in case you mised her/it, is the digital assistant that Microsoft introduced to Windows Phone 8.1. Recently, 
two separate reports confirm that the system is coming to Windows 9. This would essentially  add voice search, and other voice activated interactions, right into  Windows 9.
This idea is also consistent with a recently leaked  poster (see below) that refers to the need to make Windows 9 "deeply  personal". Adding a personal assistant like Cortana seems like a good  way to kickstart that idea.

Windows 9 Price: Could Windows 9 be subscription based?
We  don't know this for certain yet, but it's reasonably clear that Windows  9 will see a change in how Microsoft sells Windows 9 and that the  Windows 9 price may be significantly lower than previous releases.
The  two sources for information on this topic are WZOR (again) and  respected journalist, and Microsoft expert, Mary Jo Foley. WZOR believes  the base operating system will be free, with certain features costing  extra as part of a subscription. This could take the form of enterprise  features costing extra in a similar manner to Office 365.
Foley,  meanwhile, believes that Windows 9 will be free, but only without the  desktop. This is somewhat consistent with current Microsoft policy  whereby products of a certain size or price are effectively exempt from  the licensing fee, though how Microsoft would charge for desktop  versions and what it would charge remain up for debate.
These two ideas aren't necessary mutually exclusive, either, and clearly show that discussions within Microsoft are ongoing.
As  noted earlier, a recent leaked Microsoft document refers to 'Windows  365' and thus adds further fuel to the idea that Windows could have a  subscription-based future. It seems unlikely, to us at least, that  Microsoft would make such a radical change immediately, making the WZOR   assertion of a subscription for certain features far more likely.
Windows 9 Screenshots: What else is new?
The  above screenshot is the only official concept for a future Windows  release at present, but it includes a few more clues than just what the  Windows 9 Start Menu will look like.
Here you can see a Metro app and Desktop app on the desktopChief  among these clues is the ability to pin 'Metro' apps to the taskbar and open them inside traditional desktop Windows. Arguably this is a  more serious and more useful change than an updated Start Menu. 
One  of the many criticisms of the Modern Start Screen seen in 
Windows 8 is  it forced people to use full screen apps when it wasn't necessary. This  idea works fine on a tablet, but it doesn't make much sense when you're  using a 24-inch (or more) monitor. This change would allow more users to  enjoy the benefits of these apps without the drawbacks.
What we want to see in Windows 9
Besides what we already know to be coming, there are few things we'd really like Microsoft to sort out for Windows 9
Better support for High DPI monitorsCurrently, Windows 8 is rubbish on high DPI displays, such as the 3,200 x 1,800 resolution display found on the Samsung Ativ Book 9 Plus or the 10-inch, 1080p screen on the 
Surface Pro 2.  One these devices, desktop apps often have implausibly small text or UI  elements, which completely defeats the object of having nice, crisp  high DPI screens.
Fewer hidden UI elementsOne of the  more irritating habits of Windows 8 was using hidden elements, such as  hot corners, to access certain features. Again, many of these ideas  worked great on tablets, but were an utter pain on laptops and PCs.
More Metro appsAn  obvious one, this. Even now the Windows Store lacks a little depth  beyond the big names, and it's an area that needs to improve. Unifying  the app process between Windows Phone and Windows 9 would help this, and  it's widely believed to be what Microsoft is working on.
Reduced OS sizeWindows  remains a somewhat bloated operating system. That's fine if you're  using an old-school PC, but on an Ultrabook or tablet with limited  space, handing over 30GB or so to the OS is a major pain.
Read more at http://www.trustedreviews.com/news/windows-9-release-date-beta-preview-start-menu-screenshots#BZbbrGH0H8Bt42VK.99