Only a very tiny amount (25~ games in total out of 530~) of backwards compatible games run at a higher resolution on the Xbox One X.
Actually, there are about 55 or so enhanced games. You forgot that all the OG xbox games are enhanced too, running at 1920p.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.