I watched ng-conf. There way an Angular Material 2 session. At the very end, there way a really really shy statement that they plan to deliver a beta "in 2016". So I guess nobody should hold its breath and the final release will be available in about a years time.
This is extremely disappointing. Angular 2 development was announced like in 2013. Some kind of UI library is vital to do anything with it in a reasonable fashion. But for this we have to wait till 2017 as it seems. I don't want to question the technical competence of the guys. But project management of all this is one epic failure. They should hold off on all that mobile, cli, server-side rendering, etc. and start finishing the damn basics.