Of course GT5 is going to push the PS3's sales over the 360's in the UK. It does have the Top Gear test track, after all. 
But seriously, who knows. We still have at least 2-3 years to go this gen. A lot can happen in that amount of time. And a ~ 2 mill gap isn't that much when all is said and done. Still, I don't think it's extremely likely, but I wouldn't rule anything out at this point.
@ johnglen
There is no way that Gears 3 will ever outsell KZ3, TLG, LBP2, and Infamous 2 combined. It would probably have to go on to sell over 9-10 mil to achieve that feat. It will most likely sell just like the previous 2 games, ~ 6 mil.







