As we already mentioned it several times, Intel decided to spread the launch of its Ivy Bridge CPU. After the first wave announced end of April, the second wave is expected on June 3rd and will be composed of dual core CPU and should power the next generation MacBook Pro 13", MacBook air and Mac mini.
For the MacBook Air, 17 W TDP models will be selected by Apple (U=ultra low voltage). In this category, the Core i7-3667U is rather impressive with its 2 GHz default frequency but able to jump to 3.2 GHz in Turbo mode. Of course, it has a price: 346 USD. This can also explain why it is difficult to reduce massively the price of Ultrabook based on ultra low voltage CPU from Intel, the cheapest one: 225 USD.