Current gen performance and resolution
Xbox One X uses a dynamic resolution with the highest native resolution found being 3840x2160 and the lowest native resolution found being approximately 2432x1368. Native resolution pixel counts near 3093x1740 seem to be common on Xbox One X. Xbox One X seems to rarely render at a native resolution of 3840x2160.
PS4 Pro uses a dynamic resolution with the highest native resolution found being 2560x1440 and the lowest native resolution found being approximately 1824x1026. Native resolution pixel counts near 2304x1296 seem to be common on PS4 Pro. PS4 Pro downsamples from this resolution when outputting at 1080p with forced supersampling disabled.
PS4 uses a dynamic resolution with the highest native resolution found being 1920x1080 and the lowest native resolution found being approximately 1493x840. Native resolution pixel counts near 1728x972 seem to be common on PS4.
Xbox One S uses a dynamic resolution with the highest native resolution found being 1600x900 and the lowest native resolution found being approximately 1194x672. Native resolution pixel counts near 1344x756 seem to be common on Xbox One S. All four consoles use a form of temporal reconstruction that can increase the resolution up to the highest resolution found on each console (e.g. up to a maximum of 2560x1440 on PS4 Pro) when they are rendering natively below this resolution.
Xbox One X has some enhancements over the other consoles such as: improved LOD transition distance (6:25), a longer draw distance (4:45) and improved texture quality in some scenes