The HP Spectre 13 x2 sports a detachable 13.3" Full HD display part, and an aluminum keyboard dock to go along with it. The processor and storage are in the tablet half, though, so you can just grab it and go, using the full power of Windows 8...
Source: http://www.phonearena.com/news/HP-Spectre-13-x2-is-the-first-fanless-tablet-with-Haswell-runs-Win-8-on-the-hush_id47591
Source: http://www.phonearena.com/news/HP-Spectre-13-x2-is-the-first-fanless-tablet-with-Haswell-runs-Win-8-on-the-hush_id47591