Low power consumption processors from Intel

Intel has just announced two new "Ultra Low Voltage" Core Solo processors. Operating at 1.06GHz and 1.2GHz with 2Mb of cache, they consume only 5.5W.
One can imagine many possible uses for these processors, such as a portable with a very long battery life, or even a Tablet Mac, which has been a fantasy for many years.
However, their price remains very high at around $250, so they won't be found in low-end products.