And what kind of work do you do on it? I'm a pro photographer. I routinely print as big as 16x20 and have printed quite a bit larger. It is simply not possible to properly edit for that size on a 9.7" screen. Even if I could have a pressure sensitive stylus, second screen for my tool boxes, etc. Little things, typing numbers on a keyboard compared to a touch screen make a huge difference to your work flow. Tech-wise, I work in raw, each open multi-layer file can occupy a gig of ram easily. When I set up a batch process it takes my i7-3770k a good 20 minutes to chug through it. I doubt the iPad could handle it in 20 hours. From raw-files to deliverables, my projects are in the 6-10 gig range. Where can I store these in an iPad?
In a 'past life', I worked as an electrical engineer. The main thing I learned is that the quality of tools is essental. I was amazing at soldering fine components, but I always used a high end soldering station. When I had to use a cheap iron, my results weren't much better then a rookie. You can't work without proper tools.
This is no exception. You try to do professional work on an iPad and the person on a windows PC with a powerhorse CPU, full size ergonomic input devices, and multiple monitors will put you out of business before you can blink.
Edit: I said windows PC because Apple's focus on iToyz means they no longer have a computer suitable for real work. As a long time mac user (since a g3 wallstreet in1998), I currently do about 80% of my work on a Hackintosh desktop and 20% on a real MBP. At this point I'm pretty much ready to jump ship from Apple because they simply don't care to make desktop computers anymore.