Samsung revealed the Galaxy Tab 3, a 7-inch tablet, a slim mobile device which may be able to directly compete with the smaller tablet ranges offered by rivals Apple, Amazon, and Google, CNET reports. The South Korean electronics maker’s latest tablet offering sports a 1024×600 pixel screen — although perhaps underwhelming at today’s standards — but is able to support full 1080p HD playback. The Galaxy Tab 3 is powered by a dual-core 1.2Ghz processor, and is available with either 8GB or 16GB of storage and 1GB of RAM…