Notice I said “end of this age”, not “end of the world”. The world really will end one day (II Peter 3:10, Revelation 21:1-5), but we’re not there yet. Before that happens King Yeshua has to come back and rule the earth from Jerusalem for a thousand years (Revelation 20:1-6). As far as I can tell that hasn’t happened yet. Therefore what we expecting is the end of this age: the transition between the time in which we now live and the return of Yeshua.