Do you know if any good numbers exist? While PC gaming stats may be up year over year, how does that compare in raw numbers to the big 3 consoles? My gut, though I admit to not being hardcore about gaming so take that with a grain of salt, is that the big studios are going all in on consoles. Because XBox and PC games are pretty similar they get released for both, but the number of PC-only games is vanishingly small.
How much of the success of Civ VI is based on the cross-platform nature of the game?