At this time, Windows 8 is the most anticipated OS from Microsoft, there were many news regarding the launch of Windows 8, earlier news cam that Microsoft will launch it by April 2012, then news came that Microsoft will follow Windows 7 pattern and it will be RTM by July mid.
But now Microsoft has announced that Windows 8 will be RTM by the first week of August 2012 and its general availability will be made in late October, which means you will get your hands on this new OS in October which is currently in Release Preview Phase or RC.
Enterprise customer with Software Assistance have full access to Windows 8 by August itself. Windows 8 Store Store will also go live to do commerce as currently only free app is available on it. Store will be available in 109 languages in 231 countries.