But this technology allows the same result without the need to invest more than a fraction of the money needed to construct a new tower.
It also allows standardised working positions between different airfielsd and allows a better utilisation of controllers. That presuming the regulators approve controllers to be valid on several remote airoprts, but I am sure that will happen (if it hasn't already). This is the stuff we can do today. Add on top of that several other possible improvements and efficency increases.
Yes building a really high VCR works, at least to an extent, but having been in several towers even the high ones often have blind spots. Heathrow is 90 meters and still has blind spots due to the height of T2 and T5. Amsterdam is also very high but they built a secondary tower for one of their runways so I'm assuming they have similar issues (although I have never been in the tower there sadly).
Remote towers are here already and I'd be very surprised if they wont be staying.