Are we going thru another Conqueror moment with the Armata?

via The Tank Museum‏ 

The Conqueror was the last Heavy Tank used by the British Army. It was developed during the late 1940s and early 1950s as a response to the Soviet IS-3, which it was feared outmatched any existing Western vehicle.

I gotta wonder.

Are we going thru another Conqueror moment with the Armata?  Oh and be advised the Brits weren't the only ones spooked by this.  The US Army and most curiously the US Marines bought the M-103 in response to this threat.

I ask that with regard to the Armata but does it also apply to the arms race we're seeing with regard to the upgunning of the Army's future IFV to 50mm?

Just musing out loud.

I have no idea but if we're chasing ghosts and not planning properly then we're potentially wasting resources.

I guess I asked all this to get to this point.  What is the Army seeing that makes the 50mm the objective weapon?  What have they seen that makes the 30mm suddenly non-viable?

Any ideas?