I've noticed a step backwards in exterior views of cars relative to GT5P - mainly a sort of flickering along some edges, notably where there's shadows (eg wing mirrors in replays).
Yes, I'm running in 1080p via HDMI to a 116cm LED TV.
I see people saying they have a hard time reading the gauges but I don't understand that really. I sit about 15 feet away from my 32" 1080p 120hz Samsung LED TV and have no problem at all seeing/reading anything including the menus.
I sit about 3ft away from my 24inch gaming grade monitor (dell 2408wfp), and I struggle to see some of the dials in the cars. I have nigh on 20/20 vision too. 👍