That doesn't really imply that the next generations of Bulldozer will be faster - but rather, will be more efficient power wise. Like the first generation may be 95W, the next 65W, and maybe like 45W in the third.
Of course, this will be needed because people will want laptops with Bulldozer, and 95W is battery prohibitive. Sure, there are some power thrifty processors, but they don't have the performance required by modern software as it is evolving. Like netbooks, right now they are limited to lightweight, feeble OSes like Win7 Starter - but people will really want to run a minimum of Home Premium, which would really just suck on a sub-2GHz, single core processor. And it won't be the home style users driving that, since many regular users will entirely adapt their applications to the machine availiable - but in a Corporate environment, they will want to run all of the big tasks, just like on a desktop - and AMD will really need to come to bat if they want to cash in on that vast market.