The Register have done a side by side comparison of the new AMD chip vs Intel's Sandy Bridge and the results are quite interesting. Especially the price differance! In the test they used 2 identical HP laptops but selecting the differing chipsets for each. All other components are identical.

AMD Llano vs Intel Sandy Bridge ? reghardware

Looks like AMD may have finally got to hit the sweet spot they lost when the Intel Core range was initally introduced.