We've seen the grass in stills elsewhere. It doesn't look good and heavily lacks shadowing.
I've got no stake in this fight, but I think Forza Motorsport is gonna blow this out the water later this year. GT7 still looks a whole lot to me like a modestly updated GT Sport, which I'm sure is exactly what it is.
There's actually new grass assets on this Daytona track that look great. Looks a lot better than the long weird same looking blade of grass that was in GTSport. With short grass like this you're not going to notice self shadowing at these distances and angles anyway, even in real life.
for comparison
You dont see anything terrible? The environment looks super flat and dated in general. The cars in GT always look great, that part's never in question. But I really dont know how you can look at that screen and say you dont see anything wrong with it.
No, a blurry view of barren Turn 5 on Daytona doesn't show me much. I could find much worse looking stuff in Driveclub, Forza 7, or pcars2. For that image I see more issue with there not having something like fully realistic and ray-traced ambient occlusion rather than an issue with the actual track model detail. It's a weird pic to judge the whole track though when there was a full gameplay segment that looks pretty spot on to the real Daytona.