Remember that discrete GPUs are used with CPUs from other vendors as well, not just from AMD, so it helps to look at the product placement relative to all the desktop systems out there rather than just the latest AMD products.
That said, I usually buy the midrange part (my last board purchase was an HD 5670) so I'm probably not the best person to be arguing the merits of the entry level discrete GPU
Also note that most of the Llano design wins were for notebook rather than desktop, although it does make a pretty slick desktop system. I don't think anyone is suggesting that an HD6450 is the right match for a Llano anyways.