CMake is interesting because the CMakefiles are just a different type of editable/configurable build script (ie. slightly different Makefiles). It's still an interpreted step between build instructions and the output that you actually use to build which isn't meant to be edited and therefore obfuscates part of the process... so autoconf. This is both a strength and weakness in that there are so many external modules for CMake (eg. the various FindX) that they work great most of the time but when they break they are more difficult to fix than an atomic change to the actual compiler flags in a Makefile.

I don't think there will ever be a standard build tool, simply shunts to get the needed functionality from others. Eventually all build tools will exist in each other and the only interface will be recursion.