They're pretty much just upscaling and interpolating right? They can't fill in anything that's not actually there, like you could with a model that understands

They're pretty much just upscaling and interpolating right? They can't fill in anything that's not actually there, like you could with a model that understands "Hey this tree is a actually just a PS2 era low poly model, but here's a picture of what it should look like, make it fit somehow"