Dell is trying an unusual strategy to try and steer ultrabook buyers towards the XPS 13 on Thursday. Nicknamed the Ultrabook Challenge, the demo campaign Thursday amounts to a blind taste test for the thin-and-light notebooks. Starting in San Francisco first, those at the corner of Chestnut and Scott, and later at Fisherman's Wharf, are being asked to pick an ultrabook based on "look and feel" with all the branding covered up, ostensibly to avoid bias.
