Gran Turismo always been like this, the high fidelity graphics is only in the replay mode of the races and that's what the always show in the trailers
the graphics ain't never been cream of the crop since the playstation 2, also I don't know any would want raytracing on a racing game when you need as many fps as possible
Gran Turismo is about the gameplay not the graphics
However, since this is confirmed coming to PC with that Geforce leak, you will get to experience the best console racing sim, above 120fps for the first time, and will probably have full raytracing along with DLSS 2.1 support, so we will see how stacks up against the hardcore pc racing sims