Not content with showing off just one tablet at CES, Asus has shown off four variations on the theme, with the Eee Pad MeMo, Slate EP121, Pad Transformer and Pad Slider all having their own little selling points.According to Pocket Lint, the devices will run both Android and Windows 7, although significantly, Asus has referred to the Android Honeycomb on the devices as 3.0 - despite widespread speculation that this tablet-friendly operating system will be Android 2.4. Expect this one to have a few twists and turns before we know for sure, but we're guessing 3.0 is right if Asus is talking it up at a press event.In terms of the devices, the Asus Eee Pad MeMo looks to be a Galaxy Tab rival, complete with 7-inch capacitive display, a Qualcomm snapdragon chipset and that Android Homeycomb OS. There will also be 1080p playback, support for a stylus, dual cameras, a MeMIC media phone extender and a mini-HDMI to connect to your HD-ready TV. A US price has been announced, somewhere between $999 and $1,099. No news on a UK price, which is rarely a straight currency conversion.The Eee Slate EP121 is more of a traditional PC top be honest, a Windows 7 Home Premium powered device, offering up an 12.1-inch, 1280 x 800, display, with Intel Core i5-470UM processor, 64GB of SSD storage and 4GB of system memory. More interesting to us is the Eee Pad Transformer, another Android Honeycomb device, this time with 10.1-inch, 1280 x 800, IPS touchscreen display and able to be connected to a keyboard, instantly turning it into a laptop (if you want the best of both worlds). It also has dual cameras (1.2-megapixel and 5-megapixel), Wi-Fi, USB, Bluetooth and a built-in card reader, as well as offering 1080p playback, Adobe Flash 10.1 support and an Nvidia Tegra 2 dual core processor. Finally, Asus has launched the Eee Pad Slider, a tablet with slide-out QWERTY keyboard and like the Transofrmer, offering a 10.1-inch IPS, 1280 x 800, display, Nvidia Tegra 2 dual core processor, Android Honeycomb, two cameras, Wi-Fi and Adobe Flash 10.1 support as the Transformer. In terms of launch, Asus is looking to bring the devices over a six-month period, the Eee Slate launching in January, the Eee Pad Transformer in April, the Eee Pad Slider in May and the Eee Pad MeMo in June.