Watch: Microsoft's all-new Surface tablets with Windows 8

At a much hyped event held at Milk Studios in Hollywood, Microsoft unveiled its new line of Surface tablets. While one will feature Windows 8 Pro, the other will run on Windows RT with ARM-based processor.

The new family of computing devices, as Microsoft calls it, is directly competing against Apple's iPad and other lightweight hybrids. Both devices include ultra-thin covers that double up as a keyboard and will be available in a range of colours as well.

Speaking of hardware, the Windows RT version of the tablet is thinner and lighter than its Windows 8 Pro sibling. The former measures just 9.3mm in thickness, comes with a 0.7mm kickstand to hold it upright and a 3mm touch keyboard that attaches magnetically like the iPad's Smart Cover.

The thicker companion running on Windows 8 is 13.5mm thick and a little under 2 pounds. It is expected to be priced similar to other ultrabook offerings currently available. The Pro version also comes with a stylus that snaps on magnetically to the side of the tablet and allows users to jot down notes.

The Surface sports a 10.6-inch screen and comes in an aspect ratio of 16:9, which is well suited for widescreen viewing.

The two things missing at the event were pricing details and battery life of the Surface tablets. As far as availability is concerned, the RT version will be timed with the release of Windows 8 and the Pro version will arrive three months later.

Windows RT version of Surface
Processor: NVIDIA Tegra-based ARM chip
Weight: About 1.5 lbs. (676 grams)
Thickness: 9.3 mm
Screen: 10.6 inches (diagonal) with ClearType HD Display
Connections: microSD, USB 2.0, Micro HD Video, 2x2 MIMO antennae (for wireless communications)
Storage options: 32 GB and 64 GB
Extras: Runs Office '15' Apps, Touch Cover, Type Cover, VaporMg Case and Stand
Availability: Alongside release of Windows 8

Windows 8 Pro version of Surface
Processor: Intel Core i5 (Ivy Bridge)
Weight: About 2 lbs. (903 grams)
Thickness: 13.5 mm
Screen: 10.6 inches (diagonal) with ClearType Full HD Display
Connections: microSDXC, USB 3.0, Mini DisplayPort Video, 2x2 MIMO antennae (for wireless communications)
Storage options: 64 GB and 128 GB
Extras: Touch Cover, Type Cover, Pen with Palm Block, VaporMg Case and Stand
Availability: Three months post Windows 8 launch