Here are a few things I've noticed.
- Compile time reduced. Replacing my N duplicates of a template with a single instance means less work for the compiler
- Less code. Is some cases *way* less code. This is great! Can replace manually duplicated templates with 1 instance, can also replace Boost Preprocessor generated templates with variadics
- If you step into a variadic function in the debugger it does not always allow you to see what values were passed into the function. I did see it work once, so perhaps it is just buggy/incomplete and the final release for VS 2013 will fix this.
- The following code does not compile, to work around it, as far as I can tell, you must resort to C++ 03 code(boilerplate). You couldn't instantiate this type because it doesn't map to a struct/class, but it would make it easier to pass type information around.