Bah... 'the tank is obsolete' is one of those cyclic idiocies that military doctrines go through. The gun was 'obsolete' on aircraft in the 1960s. Until US pilots got into some dogfights in Vietnam and discovered that missiles were not 100 percent effective.
Big surprise there. They had to put external gun pods on the F4 Phantom to let our pilots keep fighting when the enemy closed in. At least they did learn from their mistake and put guns in the original design for the next generation, the F-14/F-15/F-16 series. Those simple (and cheap!) shaped charge weapons did make the battlefield dangerous for tanks for a while, but they came up with counter-measures in the next generation of armor. Despite this there was some resistance to building the M1 Abrams on the grounds that tanks were 'obsolete'. Well, OUR tanks sure didn't look 'obsolete' in Desert Storm...
The tank will not be obsolete until, as already said, we have the SciFi type of tank that walks.
The real observation to be made here is that the 'highly irregular warfare' of the future, where terrorists do their best to attack where our defenses
ain't will not be won with heavy weapons. I suspect that the very dangerous merging of police and military that we've already begun to see will continue in the attempt to cope with this problem. We'll have 'SWAT' teams getting more and more heavy-duty and high-tech, and police legal powers getting more and more crazy - as already demonstrate with the 'Patriot' and 'Patriot II' acts.
