It depends what were your intentions for using it.
For me the number one reason I bought it was for storing and reading PDFs which I have tons in my desktop but I didn't want to be confined to a desk reading for hours.
The second was that I use the iPad as a secondary monitor to aid my workflow such as following a video tutorial, look up visual references.
And lastly, I use the iPad to aid my clients: When I need to show a draft project, I can sync a preview, do some draft changes. I do not have to bring a laptop. I also find the iPad extremely useful out in the field especially photography; the iPad is velcro mounted front-faced to a backpack while my DSLR with built in Wifi dumps RAW images as soon I take a shot to the iPad for live previewing along with camera's metadata. Having a laptop, regardless how portable was awkward to use because of the form factor.
I always thought the iPad wasn't indended to replace your main computer but to aid it like a companion device not just a quick access to a webbrowser as other people proclaim.
I've been telling people that they really need to define their purpose before they go ahead and purchase any object. Maybe you just bought it for the hype which is a bad idea for any purchases because its not going to establish your use in the future.
If iPad v2 comes out next year, would you really need it regardless how much better features its going to have?