Left out, which IMHO is a good thing. The C++ language as it stands right now, especially with the C++0x additions has provided plenty of new features that are going to help developers build amazing software with more power.

Not everyone wants or needs garbage collection and it would be a downright pain to bolt it on now.

Feel free to use one of the umpteen other programming languages that does provide garbage collection, clearly if you are complaining about that you are simply using the wrong tool for the job.