Hewlett-Packard (HP) unveiled some of its upcoming Windows 8 Ultrabooks and laptops a little over a week ago, and now it is time for the company's new all-in-one PCs. The HP Spectre One, HP Envy 23, HP Envy 20 TouchSmart, and HP Pavilion 20 will all debut this fall, packing features such as multi-touch screens and NFC technology.

At the high end, the HP Spectre One is a powerful all-in-one PC with a stylized design and a non-touch 23.6-inch, 1,920 x 1,080-pixel display, a track pad, and NFC technology dubbed GP TouchZone. The touch screen and built-in optical drive were sacrificed in favor of thinness. At just 11.5mm-thin, the Spectre One is HP's slimmest all-in-one PC. Though Windows 8 was designed to work with touch screens, Microsoft said it will work with non-touch screens as well.

The HP Spectre One includes two USB 2.0 ports, two USB 3.0 ports, an HDMI connector, Ethernet jack, Beats Audio, and a memory card reader. The TouchZone feature, however, is more unique. The base of the unit incorporates a sensor which allows users to log into the Spectre One or transfer files to it simply by swiping an NFC-compatible smartphone or device equipped with an NFC transmitter sticker. Two such stickers come out of the box with the Spectre One, courtesy of HP.

HP did not offer many details regarding the traditional PC specifications, but it did mention a 1GB Nvidia GeForce graphics card, "the latest Intel processors," and Condusiv ExpressCache among available options. The Spectre One can also be configured with up to two terabytes of storage and a solid-state drive for faster boot-up times. The high-end all-in-one will launch in November, with a starting price of $1,299.

Meanwhile, the HP Envy 23 and Envy 20 TouchSmart sport 23-inch and 20-inch touch screens, respectively, and have more compact designs than the Spectre One. Both come with third-generation Intel processors and can be configured with up to three terabytes of storage and solid-state drives. The Envy 23 starts with a $999 price tag, while the Envy 20 starts at $799. Both machines are scheduled to launch in October.

Lastly, HP also offers a simpler, more affordable option. The HP Pavilion 20 features a 20-inch HD non-touch display, supports up to 2TB of storage, and comes with a choice of Intel or AMD processors. It will make its debut in October as well, with a starting price of $499.