Hi

Yes, that is correct.

The Store Apps (formerly Metro) can only be distributed through the Windows Store.

Any developer who builds these apps, must have a Developers License and each app must go through a certification process and be validated before being placed in the Windows Store.

If you are an Enterprise customer, you can SideLoad Apps, but these must also be certified nad can only be used with a special product key that is available to Enterprise customers.

MSDN Blogs: Deploying Metro style apps to businesses

http://blogs.msdn.com/b/windowsstore/archive/2012/04/25/deploying-metro-style-apps-to-businesses.aspx

Managing Client Access to the Windows Store:

http://technet.microsoft.com/en-us/library/hh832040.aspx