Defining OO as based on the use of class hierarchies and virtual functions is also practical in that it provides some guidance as to where OO is likely to be successful.
First, I'd like to see the basic tools such as compilers, debuggers, profilers, database interfaces, GUI builders, CAD tools, and so forth fully support the ISO standard.
It is easy to study the rules of overloading and of templates without noticing that together they are one of the keys to elegant and efficient type-safe containers.
My list of basic tools is a partial answer to the question about what has changed: Over the past few years, large numbers of programmers have come to depend on elaborate tools to interface code with systems facilities.
People who passionately want to believe that the world is basically simple react to this with a fury that goes beyond what I consider appropriate for discussing a programming language.
This evolution may compromise Java's claim of being simpler than C++, but my guess is that the effort will make Java a better language than it is today.
With the increasing importance of standards for system-level objects such as COM and CORBA, it is particularly important that the C++ bindings to those be clean, well documented, and simple to use.
