PC World - Samsung debuted the Galaxy Tab on Thursday, a portable tablet computer that just might be the first significant challenger to Apple's iPad. The Galaxy Tab features a 7-inch multitouch display, rear- and front-facing cameras, 1Ghz processor, 1080p high-definition video playback, maximum 64GB storage and Android OS 2.2. The new tablet device will also come with 3G, Bluetooth 3.0 and 802.11n Wi-Fi connectivity. Samsung says the Galaxy Tab is only the beginning of the company's foray into touch-based tablet devices.