Over at Ars Technica is a close comparison of a half dozen ultrabook models from a variety of manufacturers, with the purpose of determining which stand above the others.  As there are as many ways of using an ultraportable as there are people who carry them around, they've split their findings into a number of categories.  Take a look to see which models are tops for business use, best overall, best convertible or best detachable, just to name a few. 

"Ultrabooks have become the standard design for most premium Windows laptops, and they represent the best of what companies like Acer, Asus, Dell, HP, Lenovo, and Microsoft have to offer in terms of design, power, and innovation."

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