Microsoft Corp unveiled the Surface tablets with the Windows 8 operating system on Monday. This step taken the software giant is a great competition to Apple Inc, the maker of the iPad. The Surface tablets will be launched in the fall and will come in two models. The lighter and cheaper version will be rival to the new iPad. Definitely, the launch of these tablets will make a twist in the tablet market. Here is a comparison of the Surface tablets with the others like Apple new iPad, Samsung Galaxy Tab 2 10.1, Amazon Kindle Fire and Barnes & Noble Nook tablet.