People dont tend to focus on something like the "silent majority" of XBO titles that are 1080P. All the annual sports titles, for example. That's a lot of titles. Tons of remasters. That's a lot more. And many less demanding titles. Most indie or downloadable titles. Add all those up and I think the clear majority on XBO is 1080P. At least the titles in my older sig, more are 1080P than any other resolution.
That said, the very biggest 3D multiplat triple A's, do tend to be 900P on XBO and 1080 on PS4 (or 720/900 in the case of BF games). Still. Deus Ex Mankind Divided being a recent example. And these are the most well known, probably popular, titles.
Also, there's been a increase in dynamic resolution titles, making it harder to classify particular games.