GT5 Update: 7.3 Million Shipped * as of Sep 2011

[Munkeh111]

So GT 5 is doing rather well, and it could creep to 10m, just, which would be very impressive

I think it will keep going for some time, as I would be very surprised if they released GT 6 on PS3, the next GT is likely to be on Vita before 6 on PS4, and the lack of any sequel should help its sales