Which is to be expected. But you can't seriously buy that a mere resolution upgrade is all the next-gen consoles are capable of. It severely undermines that reserved power inside.
Resolution upgrade is NOT the only thing the new consoles are doing. Aside of the resolution bump, assets are also upgraded. Texture resolution, texture detail, you may see individual stitching and laces on outfits while the last gen version may not have any of that at all.
What you see below is not something that magically appeared when increasing the resolution, so NO, it's not just last gen games running at higher resolutions.