Yes.
Assuming you could armor-up a tank to defend against this, the weight, and the energy needed to move that weight are impractical to impossible. And the armament? The current Abrams main gun MV of a 120mm sabot round is +/- 5,200 fps (if memory serves). Doesn’t come close to generating the same kinetic force.
Yes, this is a potential game changer. But...how to provide the power to fire this beasty is the $64,000 question.
regards,
Humans are infinitely clever at making weapons work. Might be a few years but a system that requires no explosives or fancy fuses is desirable beyond belief. At those velocities you can hit anything you can see and everything is at point blank range in a practical sense. No more need for ranging. Just aim and shoot.