OK l just tried GT7 with the latest patch.
1. (RT, PSSR on, 60hz) full lap of Nürburgring.
Yes, it's definitely a noticeable improvement. The barriers are noticeably less distracting but still not always perfect. The barbwire fencing can have noticeable issues. I'd say overall is satisfactory. You get a more temporally stable image more of the time and a sharper image to boot.
2. (RT, PSSR off, 60hz) full lap of Nürburgring.
The image is more temporally stable than PSSR (PSSR off is normally my default), but it's less sharp.
Overall
Does DF's opinion of PSSR 2.0 being "good enough" on Resident Evil Requiem apply here? I'd say it's not quite "good enough" as it's needs more work to be more temporally stable. You'll want to decide if you want a sharper image (PSSR on) or more stable image and less sharp (PSSR off).
This PSSR update will be very game dependent that I'm sure off.