True; but I don't really need a quad core (like the i5 or i7 iMacs). And the truth is most others don't either.
Right now, if you aren't using Handbrake, Photoshop, or another pro app, quad core is a waste IMO. That will change, of course, as developers rewrite more 'everyday' apps to take advantage of 4+ cores. A C2D is more than fast enough for everyday use.