I see so many assumptions saying "it must run hot". Assumption, as just about everyone should know, is the mother of all screw-ups.
If you are going to be one of those people buying the flagship eight-core FX series processors, you're probably not going to leave it at stock. You're likely a gamer or other enthusiast who will be looking to push the processor beyond it's stock speeds.
You're going to overclock, and thus you're going to replace the stock cooler anyway. No true enthusiast of any caliber uses stock cooling on an overclock.
To me, it simply looks to me like AMD is targeting what will probably be their largest customer base when these eight-core beasts hit the market. Customers who will be tossing the stock cooler anyway in favor of either a high-end air cooler, or liquid cooling such as they are talking about here.
Though high-end air coolers perform just as well as these stand-alone self contained liquid CPU cooling kits, they are also much larger. So to me, it makes sense to include them with the flagship processors in a kit. PIB I think they are calling it, Processor In a Box.
So chances are, there will be more than one version available. The PIB that will include whatever self-contained liquid cooling they decide to go with, and another that will contain a standard air-cooler for those people who will run at stock, or enthusiasts who already have aftermarket cooling they intend to use.
I for one do not need an included liquid cooler. The Thermaltake Frio I am running on my 1090T at 4.2GHz is more than enough to keep a Bulldozer FX cool based on the fact that this cooler, and many others like it, perform just as well as the self contained liquid coolers, such as the H60.