LG Electronics' Optimus Pad (top) and the Motorola Xoom

The stage is set for a battle among new tablet PCs at the Mobile World Congress which will kick off in Barcelona on Feb. 14. Major companies including Samsung, LG, Motorola and HTC are expected to show off their new devices running on the Honeycomb version of Google's Android OS at the show. Honeycomb is better suited to the larger screens of tablets rather than smartphones and supports 3D Google maps and video chat.

After the Apple iPad threw open the market for tablet PCs, Android-based tablets are rushing in. Samsung is expected to release tablet PCs with 8-inch and 10-inch screens, following its 7-inch Galaxy Tab. Both new models will feature AMOLED displays and run on Honeycomb.

While the iPad will likely stick with its 9.7-inch screen, Samsung is trying to reach a more broad spectrum of customers by targeting different segments with products of different sizes, industry experts say. Samsung's new tablets are equipped with two CPUs and include a high-definition 8-megapixel camera.

LG Electronics is set to release its 8.9-inch Optimus Pad that it revealed at the Consumer Electronics Show in Las Vegas last month, while Motorola Mobility is launching its flagship 10-inch Xoom tablet, which was highly acclaimed at CES.

Meanwhile, Apple is expected to unveil the successor to the iPad in March or April in San Francisco.