Xbox 360 having a 6 thread 3 cores processor was not that far from that (I think Ubisoft montreal before they got their hands on dev kit were making multiCpu Xeon machine), PS3 with 7 or 8 core CELL processor really do not know what was going with that.The threading would become more important once the PS4 and XBone were both released by 2013 with 8 cores/thread,
Back in the 2005 days, the talk around those Xbox was that The other important thing to keep in mind here is that porting between multi-core PC platforms and the Xbox 360 will be fairly trivial.
I think one general issue is mistaken or talking about core versus multithreaded performance, even thought those console cpu had a lot of threads since the Xbox360 days, they did not had a lot of cpu multithreaded performance versus PC cpu gamers use and you want the most multithreadperformance on the least core usually (40k passmark on a 4core>40k on a 16 core for games usually, easier to use all the performance)