The “Consumer Preview” (a.k.a. “Public Beta”) of Windows 8 is scheduled to launch on 2/29/12 at the Mobile World Congress in Barcelona.
The roadmap will be: Developer Preview (9/2011), Beta (the Consumer Preview), RC and then RTM. Microsoft declines to give a date for product shipment. They’ve been burned on that one in the past. Also unknown is whether the x86 and ARM versions will go to market at the same time, although it seems likely they would.
Be sure to watch their news center around 2/29 for more news: http://www.microsoft.com/presspass/default.mspx
Source:
http://www.zdnet.com/blog/microsoft/microsoft-to-launch-windows-8-consumer-preview-at-mwc/11856?tag=mantle_skin;content