Mastering C++.Net

I just recently picked up a copy of "Mastering C++.Net." I've been a programmer for over 10 years but the programming world is in a constant state of flux. This little gem is a good reference for keeping up with the latest changes in the C++ world. I'm wondering how long C++ will be useful since we have some new languages and revitalized languages popping up. There doesn't seem to be a week or even a day that goes by that we don't hear about some new methodology or some trick that some hacker has figured out. I like the simplicity of OOP using C++. Managed C++ does take some of the grunt work out of coding. You don't have to worry so much about the memory issues like you used to with C++. C# simplifies things even further. At least with knowing C++, you should not have any problem learning less complex languages like C# and Java.