Sony's tabletop Windows 8 slate, the VAIO Tap 20, made its debut at last year's IFA, so it's only fitting that we're back in Berlin to meet the successor. Dubbed the VAIO Tap 21, the follow-up packs a slightly larger, 21.5-inch display, and its design is more sophisticated, to boot.
In addition to boosting the PC's dimensions by an inch and a half, Sony's bumped up the touchscreen's resolution from
