Sure this is from Microsoft? (Score 1)

notably including garbage collection.
Since when has Microsoft done proper garbage collection?

Checking and enforcing security restrictions on the running code.
Microsoft + Security?

Loading and executing programs, with version control and other such features.
I keep getting visions of using four .NET programs, using 1.1, 1.2., 1.3, and 1.4 of the same library... where the only difference is some function that none of the apps use anyway... So... Microsoft is making a secure, clean, program with version control. Is that possible?