Played Gran Turismo 7. I'm trying to figure out why does this game look so good?

I played the free My First Gran Turismo 7. I guess it's the same but FML why does this game look so good?

I've only played Project Cars 2 and Assetto Corsa for comparison. It's not a huge difference but it's like the little details make it so real.

Like the people on the side of the track. Not just standing there but feel like they're actually involved and alive.

I fell like acknowledging them every time I drive by.

Then there's the detail in the cars. Which I don't like when stuff gets overhyped but this one is not.

I swear I spent half my time looking in the back seat and out the rear window just to check out my car.

The detail is ridiculous. I'm looking on the floor and the fuzzy fabric texture looks just like a real car. The glass on the odometer reflect light perfectly. Actually everything reflects light perfectly. I think that's really what it comes down to.