I'd say that for some it makes sense. Updated C++ will be a fairly high-level language with absolute access to bare metal and near 100% compatibility with C, that's very unique. And the world is in a desperate need for a deterministic (i.e. optionally garbage-collected) bare-metal replacement for C for systems programming. D could be it, but Walter just won't let the community to have some control of it.
Moreover, I suspect some of these improvements around the type system will allow C++ compilers to generate faster code than C compiler could ever achieve because programmer's intentions will be better expressed.
I only wish they expanded the standard library more. As far as I'm concerned, C++ doesn't really have a standard lib: STL is often awkward to use and very limited, for instance std::string is next to useless and iostream is such a pain... Then we have Boost, it comes with insane build times, incomprehensible compile error messages and multi-platform issues, so most C++ programs mostly fall back to C lib for basics like I/O, or to platform-dependent frameworks like MFC.
I also hope that external templates will work as promised. In the current form, templatized C++ works well only in a form of one giant file where everything is included in the correct order. Perhaps this is why every single C++ project in my relatively long C++ career has been using the language in "C with classes" form despite my best attempts to convince people that templates aren't always evil.
Speaking of Python and C++: possibly some of us would wish to write Python and get C++. Mark Dufour has been persistently plugging away at a Python-to-C++ compiler (and welcomes help): http://shed-skin.blogspot.com/
I don't doubt that most of the (non-idle, non-phone/TV/etc.) CPU cycles in the world are probably being burned by executing code written in C/C++. But the stuff in my shopping bag probably also did better than 90% of its movement by truck/train/ship.
P.S. Mark Dufour's ShedSkin may have you covered for 100x of that 200x speed hit you mentioned in another thread: http://www.hxa.name/minilight/#comparison is instructive (one small case, restricted, etc. Void where prohibited by law).
[Confession: I once caused the Bell Labs 'cfront' tape to be ordered, and loaded into unsuspecting Vaxen innocently running BSD Unix, at an otherwise reputable school. I allege, in my defense, that I mostly used it only as "a better C" (back then, C did not have function prototypes); and that, at the time, no other grad students were noticeably (further) deranged by the availability of C++.]