You're correct, but I feel that I have to point out that Tessellation doesn't "fix" textures or even low poly models for that matter. They still have to be redone in the case of textures or have poly's added for the models by the artists. Tessellation doesn't make higher quality content, it's just a better way of scaling higher quality content down than having multiple LOD's.
The unknown is whether PD will actually spend time redoing all standard car textures and modifying the meshes and to what standard these will be done to. We have heard blanket statements which point to it being the case, but we still have no idea of the quality they will be redone to.
Also, while a bit of a troll post (obviously), Kake's point does stand. In 2010, this was a standard that PD were apparently happy with. So to say 'to PD's standards' isn't exactly clear cut. Some things they have certainly been happy to sacrifice in the past and to this day even. Personally I think it's more of a case of if they can't get everything done to their highest standards, they won't do any work to it at all, but these days still feel the pressure to add more content so include it anyway. They set the bar too high for GT5, and because of poor planning, had to couple the extremely overdone content with horrible last gen content just to have the sheer numbers they thought they needed. I think with GT6 they are looking to reach a compromise and are planning things a bit better (hiring more staff). The Premiums are still ultra premium, but I'm sure some of the extra staff they've hired are focusing just on upscaling the standards. With the GT5 mindset they would have thought that's a waste because it would mean x amount less premiums. But perhaps some of the new modelers they hired aren't experienced enough to do premiums just yet - upscaling standards would be a great learning process for them.