Future of "User Instance" in SQL Server

The following "SQL Server 2008 R2" page about "User Instances for Non-Administrators" has a note at the top that reads:

This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature.

http://msdn.microsoft.com/en-us/library/ms14开发者_Go百科3684.aspx

What is the future of this feature? Will it be dropped entirely? Replaced by a different feature? Is SQL Server Compact edition meant to fill this space?

Bump. Nobody? Does anyone use the User Instance feature?

This feature is deprecated in favor of SQL Server Compact 3.5: http://msdn.microsoft.com/en-us/library/ms143729.aspx

A few explanations on the reasoning from a Microsoft person: http://social.msdn.microsoft.com/Forums/en-US/sqlexpress/thread/6764e959-4a32-49e3-ae84-61471d6a105a