You're kind of asking the question wrong. In my mind it should be "Is it worth investing time and energy in developing Windows apps". Metro apps are a mix of H

You're kind of asking the question wrong. In my mind it should be "Is it worth investing time and energy in developing Windows apps". Metro apps are a mix of HTML/CSS/JS along with the existing frameworks for the deeper function stuff. The existing frameworks for the deeper stuff are used throughout the eco system. They apply to much more than just Metro apps. So even if Metro apps fail, you'll still have a useful knowledge base to develop plain old Windows apps, or web apps.