then I am confused as to what specifically you are referring to I guess. In my opinion it is but that does not mean I am saying you are incorrect or calling you out on it.
Actual Gameplay would be (not all inclusive);
Exploration
Combat
Crafting
Dialog
While PC hardware can make the gameplay itself better, there's no hard-mechanic that a PC can do, that a Console hasn't demonstrated it can do as well. You know, a PC may be able to put 20 enemies on screen in a single combat encounter, but the Console can still perform the same encounter, with less.
So basically, what Todd means, is probably (Probably because I'm not a Bethesda dev, so always leave room if you're interpreting someone) there was no game mechanic they had on their list, that resulted in "The hardware can't do that".