Considering all the teasers it had been dropping, we sure had some pretty high expectations for today's ASUS CES announcement. The company had been hinting at a dual-boot Android/Windows tablet, and a later video sure seemed to imply we'd be seeing new smartphones in 4, 5, and 6-inch screen sizes. Now that's all been confirmed, as well as some surprises. The Transformer Book Duet is ASUS's new dual-boot, hybrid, all-sorts-of-convertible tablet. It goes from Android to Windows 8.1 at the touch of a button, and from tablet to notebook with its keyboard dock. There's a beefy Intel Core i7 ...