Why the next Galaxy Nexus must have quad-core CPU

I know there are a ton of rumors going around (oddly identical) that the new Nexus phone will be just a tad better than the Galaxy Nexus (slightly better processor: dual-core 1.5 Ghz, memory card support, better camera: 8Mp and an extra "HD" added to the display). And I think we can all agree that this is a pretty lousy update. But is this what Google really has planned? I mean, the Nexus 7 just came out, it's cheap (about $200) and most importantly it's quad-core. So wouldn't it make sense for the new Nexus phone to have at least a quad-core CPU? if not cheap as well?

Also, since I've reached this point, I would have to say that upon further thinking, the best decision (Android-phone-purchasing-wise) would probably be to wait out until the next Nexus phone with a quad-core, because that is pretty much the top of the hardware upgrades (sure they, can add more RAM and better memory but it won't make much of a difference). And if you reached the top of the hardware that means that future upgrades will mostly be software-based (which since you're buying a Google phone) you're pretty much set up. 

So my recommendation is to wait until the next Nexus with quad-core. (I hope I'll make it..)