The Apple iPad is a popular and useful utility whose millions of units sold worldwide in the first few days. However, Android may bring to you a better option because it is an open source free operating system owned by Google.Here is a lot of useful information about the basics and imagine you don't know what Android is.
Originally it was planned to be used as a mobile phone OS but it is starting to flex its muscles and expand its horizons. As a mobile OS it is already hugely popular, HTC Sony and many others have adopted it as the system of choice for all their smart phones and here's why. The fact it's open source means they don't have to pay for it, which is obviously a great start but it goes further than that. The fact it's open source means everyone and anyone can develop apps for it, modify it heck they can do whatever the like with it. A huge subculture has grown around Android of developers, modifiers and programmers, all making killer apps that they can put out onto the market with no licensing costs and either distribute for free or make money from. the amount of apps will very soon overtake Apple's App Store for the amount available and it will just keep growing and growing. It's unstoppable.
So what does this have to do with the iPad? well Android is now spreading its wings and many tablet manufacturers are using it on their tablets and most of them can do everything the iPad can and for half the price. Ok they are not as slick (yet) but many of these tablets offer features the iPad can't because of it's closed architecture. HDMI ports that output 720p video, meaning they are also portable HD media players, memory card slots so you can easily put data on and take it off, access to the myriad of apps available to Android users and much much more.
At the time of writing this Youtube video shows the very latest tablet, still not released but the demo just shows that these things really are iPad killers check it out here.