So i was wrong, thats because i wasnt mentally ready. but its true, our beloved Gimp in the upcoming version 2.8 will sport sincle window system rather than multiple windows. for those who want to cry,"oh my god! i loved multi window system" relax.... there will be a one step option to revert back to multi window.
the single window will have tab viewer and maybe even something like aero peek for multiple opened images. and it looks awsome too. if that is not enough, right after this all the focus will be on the upcoming 3.0.
start gimping already