I would say not all the desktop apps have been 'rewritten' lately. The evolution of the desktop many, many great apps for years and decades past have been obso

I would say not all the desktop apps have been 'rewritten' lately. The evolution of the desktop many, many great apps for years and decades past have been obsoleted sometimes the software was way ahead of the hardware. If you aren't finding anything interesting that is unwritten, you might take a trip down history and see what things had been abandoned on the wayside fro one reason or other, that might be time for a refresh. As far as new platforms - I think augmented reality (such as google glass, hololens) is going to be a new desktop metaphor and see a lot of "wheel reinvention" in the coming years as the platforms become stable.