There are several other technologies which are, well, quite secret. But it's a combination of new stuff, if anything, that will produce the 30 ton vehicle that can take on an M-1 class tank and win.
It seems like we're relying on a lot of different things yet to be developed fully, each of which can be overcome by an attacker, to protect our vehicles without the weight of passive armor our current main battle tanks need to be so well protected and such lethal offensive systems.
But hey, just in case, we'll still have the M-1A3 around for decades to come. Passive-aggressive at its best!
