How do you improve one of the best Ultrabooks? You add touch and let people detach the display to use it as a Windows 8 tablet. That’s the gist of the ASUS Transformer Book, which sports a 1920 x 1080-pixel touch screen, up to Core i7 processors and both a 128GB SSD and 500 GB hard drive. The 13.3-inch display felt a little heavy in our hands, but we appreciate that you can give it a rest in its back-lit keyboard dock. Pricing isn't nailed down, but expect the base config to start at around $1,299.