1080p user here. Ive posted many screenshots. Look at the enhanced thread or console screenshot thread.
Impressions: 1 word- INCREDIBLE
I stopped console gaming a couple years ago because I started 4k gaming on PC and x1 games looked too ugly to enjoy. I have a 1080p OLED in my living room and I always have to buy every new xbox. So I bought x1x. Now my pc is collecting dust. The upgrade is massive. The enhanced games at 1080p look damn near 4k. Super clean and with enhanced textures and such games rival pc on ultra plus you are getting much better fps and amazing bc upgrades.
Ive played titanfall 2, halo 5, gears4, forza7, asscreed, madden, need for speed payback, killer instinct, skate 3, gears 3, mirrors edge, quantum break, star wars bf2, all at 1080p and all have blown me.away