What I do know is this:
The web won.
Even databases, I don't think it's a case of "Why NoSQL?" anymore. In most use cases I have to ask "Why SQL?", and do I really need to host my own? (Quick plug for Cloudant and MongoLab ;) )
To the point,
I'm starting a new learning app, it's a Metro C# music sequencer I've dubbed "Seque Beat" for a bit of fun.
Nothing really there at the moment, I want to explore portable assemblies, TDD, all the good stuff, feel free to join in.