Although I agree with many predictions, I strongly doubt, that web components will rise. Many things may be polyfilled by Polymer, but http2 cannot and without http2 every html import is an extra http request => massive performance issue. Furthermore web components and polymer are imo still too experimental to be used in production.
I also doubt, that less Frameworks will be used/created. The only trend I recognize is the modularization of frameworks. I agree, that huge monolithic frameworks are on the decline, but small modules as well as package managers to integrate these modules are on the rise. e.g. i believe that less people use sass-compass for everything, but more people use bourbon for the mixins, susy for the grid-layout, purecss for the base styling, etc.