Close enough for most people, but no. Based on their latest update[0], at the minimum it'll be missing attribute expression SFINAE, an unfucked preprocessor, and unfucked (C++98) template name lookup. If you're feeling charitable the latter two could be called bugs rather than missing features (and bugs that will break a bunch of existing code when they're fixed).

[0] https://view.officeapps.live.com/op/view.aspx?src=http%3a%2f...

Will 2015 be the year other commercial C++ vendors (Intel, Borland, Green Hills, CodePlay HP, IBM, Oracle,...) catch up Microsoft?

No, that was probably 2014.

Intel ships a compiler based on Clang: http://llvm.org/devmtg/2014-04/PDFs/Posters/ClangIntel.pdf

This means they get clang's ridiculously conforming implementation with icc's performance.

Unless Intel's documentation is out of date, they still haven't full C++11 support.

https://software.intel.com/en-us/articles/c0x-features-suppo...

Those docs refer to Intel Composer XE 2013. The PDF I linked to is with regards to Intel Composer XE 2015.

Have you bothered to read the "Version 15.0" column at all?