I don't think most people are getting the idea of Metro. Trust me, it took me a while as well when I started developing apps for WP. Having said that, desktop apps (native 32/64 bit) ones and metro style apps have different goals. Are you looking to unify
them in terms of looks? Otherwise if you are looking for a typical control (say graphs and charts), those controls should be able to function on both 32bit and metro style without any major problems.