Tho i find it difficult to believe the Soviets would fall in '41, i guess it is possible as if memory serves me, Stalin did ask a man (Russian envoy i believe) in Bulgaria? to ask for peace terms, Which only didn't go ahead due to said man saying no because the Soviets would win anyway. but fir sake of the argument peace deal went through and the Germans get Ukraine, Belarus, Caucasus etc.
Seeing as the advance would have played hell on there equipment and troops, And short term advantage would be negligible as all of maybe 1,100 tanks and 1,500 aircraft (give or take) where in any condition from there starting number of 3,600 tanks and 4,300 aircraft.
But in the longterm Malta would fall, Egypt would Fall as would the Mid East, Persia could very well have sided with Germany once Axis borders where touching with theirs, As the Persians where very friendly with the Germans.
Gibraltar would be in a bad position, Not guaranteed for successful German/Italian invasion but always small chance if no other fronts eating up resources.
After that in any ones guess, Invasion of France would be put back several years as the main fighting would have to first take place in Persia/Mid East/N Africa, With Russia tho, Would they stay out of the war in the future or would they come back with a vengeance?