I found a graph yesterday (but didnt bookmark and cannot find it again).
Basically someone collected data on 1000s of PC games on what are consider multi core friendly.
If a game only loads up 2 cores or less its considered not friendly, whilst 4 cores or more it is.
The graph had a tiny slice in a pie chart format with multi core friendly games, and then the same guy revealed that the games that get reviewed by major review outlets nearly all fell in that tiny pie slice, giving a false impression that its the norm in the gaming industry to load up all cpu cores, when its not. I already knew this from experience, but its annoying to lose this data as it would help me present this argument.
Not a single game that is considered unoptimised (runs like crap on all hardware) tends to be used by reviewers either, when they should do as thats a not too rare event, instead of looking for perfectly optimised games for high core counts.
Unless intel pull of a minor miracle a 6 core mainstream product I think will be a regression as peak performance will be compromised for extra cores.