Ah! I didn't know there's Windows 8.1
The ISOs should be helpful if you wish to 'futureproof' your spanking new application in the latest windows or test exisiting apps to see if they might break in the new win8.1
well another good reason to use it is that I am pretty sure this ain't happening in Mac or Linux
Microsoft is adding native support for 3D printing as part of the Windows 8.1 update, making it possible to print directly from an app to a 3D printer. The company is announcing the new feature this morning, working with partners including MakerBot Industries, 3D Systems, Afinia, AutoDesk, Netfabb and others.
Go http://msdn.microsoft.com/en-us/windows/apps/bg182409 now!
loving the 1.5 Mb/s download here