Another aspect to consider here is member collection pages and checklists. If someone is a PC or MAC gamer, they like to keep their games in either one of those categories. Having a hybrid section although proper and accurate, conflicts with the collection tracking side of things. You end up with splitting your PC collection into two categories, not to mention the search function nightmare and members submitting titles that they don't find in one of those two existing sections.
A good example of this are the Burger King games (Sneak King, Big Bumpin, Pocketbike Racer). These are hybrid games that work on both the Xbox and the Xbox 360 (not through backwards compat mind you). Not everyone owns a 360, or perhaps an Xbox1, but would like to add those three titles to their current list for whichever of the two they own. We currently list these in both sections so members can choose their intended system.
For the sake of the collection tools, I think double listing these is fine, members can continue to submit them for either section as needed. Maybe a special note in the trivia or overview section that they are indeed made for both and possibly adding the alternate version as a related game.
Mind you that's just my 2 cents here, when the Content Director and game database Editors weigh in, we'll have a better idea of what they have in mind for this.