And what percentage of the world does your job?
That's my bugbear with this entire discussion (and basically any thread that dares to so much as insinuate that the iPad could be used for any manner of productive work). It feels to me like the discussion could be so much more meaningful if instead of rushing to condemn the iPad, we could instead objectively list out what the iPad can do, and what people are already getting done with it. Conclude with letting people come to their own conclusions.
I mean, look around us and there seems to be its fair share of people using the iPad to get work done. The writer of BirchTree uses his iPad Pro to record a podcast and edit videos for his fledgling youtube channel. Austin Mann uses an iPad for his photography career. We have artists using iPads for illustration, writers blogging from them, doctors using them for note-taking and task management. Just to name a few examples I have come across.
I just came back from an overseas excursion with my students, and my iPad was so ideal for the stuff I did on it. For instance, having always-on cellular was a great convenience, blogging via Bear was an awesome experience, and the form factor lent itself well to being used in places like the bus. Battery life was amazing as well, and it was portable enough to fit into my backpack along with other stuff.
For every job that needs a full-powered PC to get done, it seems to me like there are just as many, if not more, which would benefit from the simplicity and ease of use of an iPad. I too admit that I can't get all my work done on an iPad, and there really isn't any reason for me to want to go to this extent either. That said, because I am frequently on the move, there is incentive for me to experiment with how I can get more done on my iPad (because more often than not, my iPad will be with me compared to my iMac, while a laptop is too cumbersome to use on the move if I am not at a desk). As a bonus, many of the workflows (such as custom shortcuts) I create to work on my iPad also carry over to my iPhone.