I have an iPad(1). As a big expensive iPod Touch, I found it's really only useful for traveling. Otherwise, you can't really run anything on it except flash-grade games and mini-applications.
I won't be buying another one until it can replace a laptop (re: a Windows 7 or 8 one). Then I can use it for all of the things a iPad is currently good for as well as all the things a laptop is great for.