The Verge recently reviewed the HP Folio 13, giving it 8.1 (out of 10) and saying:
"I can confidently say that the Folio 13 is the most well-rounded ultrabook on shelves right now. That’s not to say it is the flashiest or the most portable, but the machine is well-built, lasts the longest on a charge, is the most comfortable to use in terms of typing and navigating, and packs more performance than the others priced at $900."
(Looking again at the picture, does anyone else remember the TRS-80 Model 100? Very cool. Also powered by a Microsoft operating system.)