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?

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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