In what concerns ISO C++ compliance, yes.

In what concerns throwing out C++/CX out of the window and tell us to go back to the days of ATL 3.0, and wait for the day Herb's metaclasses arrive into the standard, not so much.

I think Microsoft did the right thing here. A proprietary extension to a programming language is expected to be short-lived anyway, unless it makes its way into the standard, which is something that must be planned for from the beginning.