AlwaysOn Failover Cluster Instances On SQL2012 Standard Edition

Hi,

I have

Windows 2012 Standard AND SQL 2012 Standard

Configuration Manager do not allow me to turn the AlwaysOn availability option in settings and default message is "You need 64-bit enterprise edition of windows 2012"

However as per MSDN SQL 2012 features - SQL server 2012 Standard edition does support 2 node cluster

http://msdn.microsoft.com/en-us/library/cc645993.aspx

Questions: 

1. How to use AlwaysOn feature with standard windows and standard sql server?
2. If not then Why anyone need enterprise edition of windows but just Standard Edition of SQL Server? Why Microsoft thought like that?
3. In Standard edition, if it support 2 node cluster then effectively it will be like Mirroring - with few new fancy features of AAG or am i missing something?

Thanks.

For quick review of new features, try virtual labs: http://msdn.microsoft.com/en-us/aa570323