The Tank, will probably go back to the role that it once was, a Infantry support vehicle, I can see Tanks being equiped with AA equipment, as well some AT and Anti-Infantry equipment, the Tanks will probably have to have stronger "top" armour, probably strong as the front, because in Urban combat, there are, quite obviously, buildings with multiple floors, so you can fire down on Tanks, where they have disadvantages (Some tanks will not be able to swing there turrets to aim at the Attackers and those with Manned Machine guns it would be to dangerous for them to pop-out of there)

Just my thaughts