IMHO OOP was always a bit to oversold. It can provide you good solutions in many cases but not everything works well with just OO. The use of singleton seems like a contra indication for the need of OO. What I think will happen is that the bothe Java and .NET will embrace functional programming and "design patterns" will emerge that use functional programming together with an OO hirarchy. The dynamic languages (e.g Python and Perl) already have this mix.