You also mentioned water changes. The potential to remove waste by moving bed filters is huge so you could definitely slow down on water changes. I would still do them periodically though.
That data only applies to genuine fluidized media, fine particulate. Not chunks of plastic floating in a tube. And what happens there is that the efficiency of nitrogenous activity is greatly enhanced, but the nitrates still build up no matter what unless another effort is made to reduce it. So while ammonia might not stand a chance against a fluidized bed, the end result is the same. Nitrates are created and must be dealt with, just a little more efficiently than otherwise.
If you want to battle nitrates to reduce water changes, I recommend emergent plants and deep sand beds. Both are effective.