Well, when I think about it, "fog of war" (players only seeing parts of maps where they have troops) would probably be quite difficult to implement in a boardgame, although not impossible.
On the other hand, I cannot think of a turn-based computer game where player B would take actions while it's player A's turn - I am talking about taking part in combat resolution (some of the examples would be Parson choosing and commanding "fighting retreat" tactics during RCC turn or Parson giving orders during dungeon defense - again during RCC turn).
Plus, I believe the authors mentioned that the rules for the game actually exist and they consider publishing it separately. I don't think it makes sense to publish rules for a computer game that does not exist.
So boardgame probably makes more sense.