There's a new Windows 8 convertible in HP's lineup. In addition to the 11.6", Atom-powered Envy x2, the company now offers the Split x2, a larger device with a 13-inch screen and an Ivy Bridge-based Core i3 processor.
The Split x2 is priced at $799.99 and seems to be available exclusively from Best Buy, at least right now. In addition to the larger display and faster processor, it packs 4GB of RAM, 128GB of solid-state storage, 802.11n Wi-FI, USB 3.0, and dual batteries (one in the tablet and one in the detachable keyboard dock). There's no word on total battery life from either HP or Best Buy, though, which is a little disappointing.
Oh, and according to Best Buy, the machine's slate component weighs 2.3 lbs and is 0.4" thick. Add the keyboard dock, and the weight and thickness go up to 4.9 lbs and 0.9". That's definitely heavy by ultrabook standards, but I suppose not many ultrabooks have dual batteries.
Either way, $800 is surprisingly affordable for a Windows 8 convertible with a full-fledged Core processor. The 128GB version of Microsoft's Surface for Windows 8 Pro still costs $999. Of course, the Surface has a higher-res screen (1920x1080, versus the HP Split x2's paltry 1366x768) and a more compact footprint thanks to its display's 10.1" diagonal size. The Surface Pro weighs about a third of a pound less, too.