... they already have Windows Update. It cannot be null-routed (respective entries in /etc/hosts are simply ignored), it is virtually always on and it can be trivially used to deliver custom patches to specific boxes. What more can you ask for?
The new "you as the user can't control the kernel stuff, even with the debugger" concept is really about the user (you) giving up the control. The excuse is that you as the user aren't supposed to be able to copy movies. In practice, you have no more control of your own computer whereas the companies have real-time control even of the content by directly controlling your computer. Some routers already did such stuff. It is really worrying -- having the part of the "great firewall of China/whateverothercountry" on your own computer which you paid with your own money.
(1) And in fact also have total confidence in the compiler itself: