Dual cores certainly are dead, my back up x4 9150e with its 1.8Ghz clockspeed ripped the old e8200@ 3GHz i used to have apart in BF3. First generation phenoms are garbage compared to C2D on a clock for clock basis.Older games ran miles ahead on the e8200 obviously
Multi-threading is here for good, i am sure my experience can be carried over to something like a Amd x4 965 blasting a G3220 or similar chip in anything multi-threaded despite the much slower ipc of of the Phenom 2.
What i would love is actually a couple pc exclusive games that honestly can use something pass 4 threads with true benefits,been seeing games using 4 threads for 7 years which is just a eternity i think.