Surelly capturing Moscow would have made little differece.By this point the soviets knew what Hitler was about,why would you  surrender knowing that the future for you at this point would be bleak if you even had one, let alone the worry of what would become of your family.Why would you surrender then just because of the collapse of a city.If you have no choice and the government was still in power and waging you to fight on, why would you collapse just because one city has fallen when you still have thousands of miles of unoccupied land,its just ridiculous.The fighting would have continued beyond the capture of Moscow however the war finally ended.