Ultimately, I don’t suspect much would change. Poland, France, the Low Countries, Denmark, and Norway were all taken too quickly for the Tigers to even keep up with the advance most times. There is the possibility if the Germans had such well protected vehicles in 1940 that Guderian would have decided to finish off the pocket of Allied troops at Dunkirk and destroy pretty much the entirety of the British regular army. That could’ve left Britain defenseless enough for Germany to attempt Operation Sea Lion, but the prerequisite of air superiority for conducting any large scale naval invasion would still not be achieved by the Luftwaffe, Miracle at Dunkirk or not.
Michael also makes the point that Moscow might also have been taken. I am fairly certain this wouldn’t have happened. While the Wehrmacht got to within sight of the domes of St. Basil’s Cathedral in Moscow, the Red Army devoted the entire spirit of the nation and hundreds of thousands of men to ensure Moscow did not fall.
Even a fair number of at the time exceptional tanks would not have swung the difference, especially if fighting in an urban area.