Yes;  it is only a matter of scale.  The two demo animations posted show choppy ripples (the first example) and rounded swells (the second fish pond example).  The displacement map sequences are asymmetrically seamlessly tiled and looped in time, so I can cover huge areas by simply increasing the tiling factor.

     For open seas, I would use a two-stage displacement;  a large-scale gross shape effect, and a finer small scale effect for detail.  You could procedurals for one and maps for the other.  Or, you may be able to re-use the same map set at large scale with high displacement and again at small scale with only a low amount of displacement.

     You would benefit from going through this thread on sea waves by bagginsbill;  it is more geared toward using procedurals to drive the displacement.  You asked about using maps to animate water displacement, so that's what I explained.  But don't disregard using procedurals.

Poser 12, Poser 13, Poser 14, in feet.  

OSes:  Win7Prox64, Win7Ultx64, Win11

Silo Pro 2.5.6 64bit, Silo 2025.1, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5